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1. constituting the necessary or inherent part of a thing; giving a substance its peculiar and necessary qualities.
2. indispensable; required in the diet, as essential fatty acids.
3. idiopathic; self-existing; having no obvious external cause.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


1. Necessary, indispensable, (for example, essential amino acids, essential fatty acids).
2. Characteristic of.
3. Determining.
4. Of unknown etiology.
5. Relating to an essence (for example, essential oil).
6. Synonym(s): intrinsic
Farlex Partner Medical Dictionary © Farlex 2012


1. Fundamentally important or necessary: essential ingredients.
2. Medicine Of, relating to, or being a condition or a disease whose cause is unknown: essential hypertension.
3. Biochemistry Being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet: essential amino acids.
1. Something fundamental.
2. Something necessary or indispensable.

es·sen′ti·al′i·ty (-shē-ăl′ĭ-tē), es·sen′tial·ness n.
es·sen′tial·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


1. Necessary, indispensable (e.g., essential amino acids, essential fatty acids).
2. Characteristic of.
3. Determining.
4. Of unknown etiology.
5. Relating to an essence (e.g., essential oil).
6. Synonym(s): intrinsic.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


1. Absolutely required.
2. Of unknown cause.
3. (of amino acids) necessary for normal growth but not synthesized in the body.
4. Extracted from, or related to an extract from, a plant (as in essential oil). Of the essence of.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005


1. Necessary, indispensable, (e.g., essential amino acids, essential fatty acids).
2. Characteristic of.
3. Determining.
4. Synonym(s): intrinsic.
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about essential

Q. Is it essential to make an exercise plan? I am trying for an exercise plan ……Is it essential to make an exercise plan?

A. by just doing any exercises any time, your body will gain some benefits. but planning it in regular schedule will absolutely help you to be healthier and more fit.
there will be a lot of benefits that you can have if you do the exercise plan (these 2 weeks to reduce some weight, then another 2 weeks to maintain it, then the rest you can start building some muscles, etc.)

good luck, and stay healthy always..

Q. How do i know what essential tools/instruments i need to buy for my baby?

A. we bought a lot of crap when out first born came along. most of it was really not useful and we could easily do without. form what i remember, we should have bought maybe second hand crib and not a new one, all this miniature outfits were really expendable. the baby grows VERY fast. all kind of shoes- until the day he start walking, it's just a waste of time.

Q. Should I go for the knife? I have essential tremor for many years, and in the last few years it seems nothing helps it, and although I tried all the drugs my doctor could offer me, nothing helps. It really ruins my life, and recently I read about a surgery that suppose to treat it, called thalamotomy- does anyone know anything about it?

A. It's a possibility, and considered effective (reducing tremor in most of the patients). However, it has quite serious side effects, that can result even in weakness of some parts of your body. You should think really good before you opt for this treatment. Good luck!

More discussions about essential
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References in periodicals archive ?
In a letter written to Chief Secretaries of the states, consumer affairs secretary Hem Pande has asked the states to take up the market intervention on a realtime basis and to review APMC Acts on priority to delist pulses and other essential food items so that farmers can sell their produce at any place of their choice, minimising stages of supply chain from the farm gate to ultimate consumers.
Supplementing our existing ISO 27001 certification with Cyber Essentials gives further reassurance to our public and private sector clients who are increasingly seeing the two certifications as the standards to meet.
Keywords: Multiple drug resistant Staphylococcus aureus, Post-operative wounds, Healthcare workers, Healthy volunteers from Community, Essential oils, Agar well diffusion assay, Minimum inhibitory concentration.
We posted a five-foot-tall tracking thermometer (similar to the type often seen in a community fund raiser) in the hallways between our cores that showed the current percentage of 8th graders who could do all 11 essentials.
We are aware that some users are having issues downloading the Microsoft Security Essentials beta after signing into Microsoft Connect and we are working on resolving the issue.
In addition Microsoft is making a promotion available on 1 October 2009 via its volume licensing channel, so that midsize organisations have upgrade rights to Microsoft System Center Essentials 2010.
The first storage offering in the company's roadmap for a unified server and storage management architecture, HP Storage Essentials enables customers to simplify IT infrastructure administration and drive collaboration without compromising control.
"This is Essentials' ninth location in the Northeast," said Schuster.
Some of developments currently offering Essentials packages include Manor Fields at Wynyard Park.
Louis Public Library promised to expand essential materials collections, increase essential services to adults and children, and make library services more convenient to use, voters in two different elections within six years increased the library's annual operating income by a total of 162 percent.