strain (redirected from strains)

strain (strān)

1. to overexercise.

2. excessive effort or exercise.

3. an overstretching or overexertion of some part of the musculature.

4. to filter.

5. change in the size or shape of a body as the result of an externally applied force.

6. a group of organisms within a species or variety, characterized by some particular quality.

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wild-type strain  that used as a standard for a given species or variety of organism, usually assumed to be the one found in nature.

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strain ¹ (strn)

v.

1. To pull, draw, or stretch tight.

2. To stretch or exert one's muscles or nerves to the utmost.

3. To injure or impair by overuse or overexertion; wrench.

4. To filter, trickle, percolate, or ooze.

5. To pass a liquid through a filtering agent such as a strainer.

6. To draw off or remove by filtration.

n.

1. The act of straining.

2. The state of being strained.

3. Extreme or laborious effort.

4. A great or excessive pressure, demand, or stress on one's body, mind, or resources.

5. A wrench, twist, or other physical injury resulting from excessive tension, effort, or use.

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strain ² (strn)

n.

1. The collective descendants of a common ancestor; a race, stock, line, or breed.

2. Any of the various lines of ancestry united in an individual or a family; ancestry or lineage.

3. A group of organisms of the same species, having distinctive characteristics but not usually considered a separate breed or variety.

4. An artificial variety of a domestic animal or cultivated plant.

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strain

Etymology: ME, streinen

1  v, to exert physical force in a manner that may result in injury, usually muscular.

2  v, to separate solids or particles from a liquid with a filter or sieve.

3  n, damage, usually muscular, that results from excessive physical effort.

4  n, a taxon that is a subgroup of a species.

5  n, an emotional state reflecting mental pressure or fatigue.

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strain [strān]

1. to overexercise.

2. excessive effort or exercise.

3. an overstretching or overexertion of some part of the musculature.

4. to filter or separate.

5. a group of organisms within a species or variety, characterized by some particular quality, as rough or smooth strains of bacteria.

caregiver role strain a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as difficulty performing the caregiver role.

risk for caregiver role strain a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as vulnerability of a caregiver for felt difficulty performing the caregiver role.

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strain,

n 1., an injury to muscle tissue resulting from overstretching.
2., deformation and distortion of tissues.
3., mental distress.

strain, ligamentous,

n asymmetric position and/or motion correlated with elastic deformation of ligaments, fascia, and other connective tissues.

strain, ligamentous articular (li·g·menˑ·chs är·tikˑ·yu·ler stranˑ),

n any condition that results in excessive or otherwise abnormal tension or strain on the ligaments.

strain, membranous articular,

n any cranial condition that results in excessive or abnormal tension in the membranes of the dura mater.

strain, muscle,

n.pl mild, moderate, or severe tearing of the muscle tissue in response to overstretching or trauma.

strain, muscular,

n mild, moderate, or severe tearing of muscle fibers in response to overstretching.

strain, role,

n stressful life event that occurs as a result of the struggle between the different demands of life. Throughout the lifetime, a person may simultaneously adopt several functions, including that of a parent, caretaker, or employee, and the competing demands of these roles may produce stress in affecting a person's health.

strain, SBS lateral,

n rotation of the occipital and sphenoid bones in the same direction about parallel vertical axes. May either be left or right lateral strain, depending on the basisphenoid's position. Also called
sphenobasilar synchondrosis (symphysis) lateral strain.

strain, SBS vertical,

n rotation of the occipital and sphenoid bones in the same direction about parallel transverse axes. May be either superior or inferior, depending on the position of the basisphenoid. Also called
sphenobasilar synchondrosis (symphysis) vertical strain.

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strain,

n 1. a deformation induced by an external force.
2. deformation expressed as a pure number or ratio resulting from the application of a load.
3. a traumatic stretching or compression of such tissues as the ligaments, capsule, or musculature associated with a joint. See also sprain.

strain hardening,

n See hardening, strain.

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strain

1. to overexercise.

2. to filter.

3. an overstretching or overexertion of some part of the musculature.

4. excessive effort.

5. one or more organisms within a species or variety, characterized by some particular quality, as rough or smooth strains of bacteria.

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strain 2 Brucella suis

used in a vaccine in China against brucellosis in all target species.

strain 19 Brucella abortus

see strain 19.

strain 45/20 Brucella abortus

the strain of reduced virulence used as a living vaccine for adult cattle against bovine brucellosis.

strain 51 Salmonella dublin

a rough strain with reduced virulence used in Europe to immunize young calves.

strain RB51 Brucella abortus

a live rough mutant that will immunize cattle but does not induce a reaction to standard serological tests for brucellosis.

strain Rev I Brucella melitensis

live attenuated strain used for vaccination in small ruminants.

strain SC54 Salmonella cholerasuis

an avirulent organism used live in a vaccine against salmonellosis in swine.

strain 9R Salmonella gallinarium

a rough strain used as a live vaccine against S. gallinarium and S. enteriditis in poultry.

cell strain

see cell culture.

compressive strain

physical stress which tends to structural compaction.

tensile strain

physical strain which tends toward structural elongation.

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strain 

1. Internal tension in a lens due to poor annealing, or to glass of a non-uniform coefficient of expansion, or from external pressure on the edge of a glass spectacle lens. It results in birefringence, which is observed with a polariscope.

2. To overwork a faculty (e.g. eyestrain caused by sustained vision of near point objects); or a part of the body (e.g. muscles); or a system (e.g. the effect on corneal metabolism of a closed eye wearing a PMMA lens. This is often referred to as

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strain

noun AIDS An HIV isolate from a person or group of persons given its own unique identifier, or strain name–eg, MN, LAI Orthopedics An overuse injury verb To injure by overuse; to wear out or stress beyond normal limits; straining may be associated with tissue microtearing Ophthalmology Overuse of eyes, resulting in transient discomfort Vox populi verb To filter; remove particles from a fluid

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Patient discussion about strain.

Q. any tips for low back strain? I'm an athlete, been having maaaajor lower back pain lately, during sports mainly but also when I just get out of bed in the morning. I was never like this- I'm really into sports and never felt so old in my life!!! Dont think the doctors really know their way with me, was hoping for some tips from your side. thanx

A. My sister-in-law has the same problem. She tried a chiropractor and that provided temporary relief. Now she is in the process of taking a series of three epidural shots. This may be an option.

Q. shoulder and neck strain and pain I have a terrible shoulder and neck pain and i keep cracking my neck muscles to release pressure. I get temporary relief with tylenol but after few hrs the pain and strain starts again.Any ideas?

A. A mellow exercise and streching on a regular basis is the best way to release a sore back and muscles in general, including your neck. You should try that plus applying local warm temperature (for example a warm pillow)around your neck. If that doesn't work then other anti-inflammatory drugs that you either apply as a cream or take as a pill can help you.

Q. My doctor advised me not to strain much. My doctor advised me not to strain much. What if I am physically unable to exercise due to a medical condition?

A. Your doctor is more concerned about your health. So accept his advice and improve in your health. There is virtually no medical condition that will keep you from doing any type of exercise. Even people with heart failure -- who were long told not to exercise at all -- can benefit from moderate amounts of activity. And people with limited mobility can often do water exercises, or do yoga or other exercises while seated in a chair (some "chair exercise" videos are now on the market). Of course, if you have any medical condition, check with your doctor before starting any exercise program.