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1. a hollow fovea or indentation.
2. a pockmark.
3. to indent, or to become and remain for a few minutes indented, by pressure.
anal pit proctodeum.
auditory pit a distinct depression in each auditory placode, marking the beginning of the embryonic development of the internal ear.
lens pit a pitlike depression in the fetal head where the lens develops.
nasal pit (olfactory pit) a depression appearing in the olfactory placodes in the early stages of development of the nose.
pit of stomach the epigastric fossa or epigastric region.
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. Synonym(s): fovea
2. One of the pinhead-sized depressed scars that develop after the pustule of acne, chickenpox, or smallpox (pockmark).
3. A sharp-pointed depression in the enamel surface of a tooth, due to faulty or incomplete calcification or formed at the confluent point of two or more lobes of enamel.
4. To indent, as by pressure of the finger on the edematous skin; to become indented, said of the edematous tissues when pressure is applied with the fingertip.
[L. puteus]
Farlex Partner Medical Dictionary © Farlex 2012


1. A natural hollow or depression in the body or an organ.
2. A small indented scar left in the skin by smallpox or other eruptive disease; a pockmark.
3. A sharp-pointed depression in the enamel surface of a tooth, caused by faulty or incomplete calcification or formed by the confluent point of two or more lobes of enamel.
1. To mark with cavities, depressions, or scars.
2. To retain an impression after being indented. Used of the skin.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


A gene on chromosome 1q32.3-q41 that encodes a member of the interferon regulatory transcription factor (IRF) family, which have diverse roles such as virus-mediated activation of interferons and modulation of cell growth, differentiation, apoptosis and immune system activity. IRF6 appears to be a transcription activator.

Molecular pathology
IRF6 mutations are linked to non-syndromic orofacial cleft type 6, popliteal pterygium syndrome and van der Woude syndrome.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


Medtalk A dell that remains transiently in edematous skin and subcutaneous tissue after firm fingertip pressure Obstetrics Pitocin, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.


1. Any natural depression on the surface of the body, such as the axilla (armpit).
Compare: dimple
2. Synonym(s): pockmark.
3. A depression in the enamel surface of a tooth due to faulty or incomplete calcification or formed at the confluent point of two or more lobes of enamel.
4. To indent, as by pressure of the finger on the edematous skin; to become indented, said of the edematous tissues when pressure is made with the fingertip.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


1. A tiny hollow or pocket. Synonym: depression; fossa
2. To be or become marked with a shallow depression; to cause a depression on pressure in edema.
3. A small depression in the enamel surface of a tooth often connected with one or more developmental grooves. It contributes to pit and fissure caries. Synonym: occlusal pit

anal pit


auditory pit

A pit that develops in the auditory placode.

costal pit

The inferior facet on the body of a thoracic vertebra. It articulates with the head of a rib.
Enlarge picture

gastric pit

Any of many foveolae in the gastric mucosa into which the gastric glands open. See: illustration

lens pit

The depression on the skin of the embryonic head where the lens of the eye will develop.

nasal pit

In the embryo, one of two horseshoe-shaped depressions on the ventrolateral surface of the head bounded by lateral and median nasal processes. It gives rise to nostrils and a portion of the nasal fossa.
Synonym: olfactory pit

occlusal pit

Pit (3).

olfactory pit

Nasal pit.

optic pit

A small indentation of the optic nerve head. It may sometimes release fluid below the retina, which can cause central retinal detachment.

primitive pit

A minute depression at the anterior end of the primitive groove or streak and immediately posterior to the primitive knot.

pit of the stomach

1. Colloquial term for the depression at the end of the xiphoid process.
2. Colloquial term for the center of the abdominal region above the navel.
Medical Dictionary, © 2009 Farlex and Partners


a thin area of the cell wall in higher plants where no secondary wall develops. If two cells have pits in adjacent parts of the wall there are often fine protoplasmic connections called PLASMODESMATA between the cells. Sometimes pits have a more complex structure, as in the BORDERED PITS within the xylem of seed plants.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


1. Sharp-pointed depression in enamel tooth surface, due to faulty or incomplete calcification or formed at confluent point of two or more lobes of enamel.
2. Synonym(s): fovea.
3. Pinhead-sized depressed scar that develops after pustule of acne, chickenpox, or smallpox (pockmark).
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about pit

Q. What are the dentists going to do if I have Pit and fissure caries? I look at my teeth and i see tiny black stuff on the fissures of my molars. I am so freakin scared. Are the dentists going to do something painful?

A. Well you will have to see a dentist if you want an answer on what kind of treatment they will offer you. Today dentists use good anesthesia so anything they will do is not supposed to be painful.

Q. tender protuding lymph node lump rt. arm pit aprox. 1/2" dia. any concerns or recommend treatment necessary?

A. lymph nodes can flare up any time you get infected in the armpit and all the area that it drains. i had it several times and it went away in the same manner that it came. i think that sometimes it caused because of a blockade done by deodorant. so i try to use this Chinese salt stone that doesn't contain aluminum.

More discussions about pit
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References in periodicals archive ?
Caption: The .45 ACP Pit Bull was test-fired with an assortment of .45 ACP loads.
Labeling breeds for purposes of shelter retention, adoption, and euthanasia is a highly dubious process, and one that is most critical for pit bulls, American Pit Bull Terriers, Staffordshire Bull Terriers, and every other so-called "bully" breed and breed-mix.
Curtin said the organization previously held a pit bull- specific program in 2014, during which it raised $10,000 and fixed 150 pit bulls.
Based on a preliminary review of published budgets of no kill shelters around the nation, and the annual number of calls the SPCA presently receives from Niagara Falls for abandoned animals--which suggest an average cost of around $250 per call and as much as $10,000 per kennel--including all expenses of a shelter facility, taxpayers should expect to ante up far more than the $195,000 they presently pay to the SPCA and as the never killed pit bulls expand in population at the shelter--more than a million per year.
A worker at the Jackson Madison Rabies Control Centre told the Nashville Tennessean newspaper that he still can't fathom why the original owner put the Pit bull in the pound as dogs get on top of each other sometimes.
The dog, a combination of a pit bull and another breed, was placed in a 10-day quarantine.
Pit bull terriers along with three other breeds of dog are banned under UK law.
The Dangerous Dogs Act 1991 prohibits four types of dog - the Pit Bull Terrier, Japanese Toser, Dogo Argentino and Fila Brasileiro.
The popular Pit Bull 14, which fuses 1-inch IPS through 4-inch DIPS pipe size ranges and other Pit Bulls are designed to butt fuse lengths or coils of pipe, as well as tees, ells and other fittings.
A MAN was savaged by a pit bull as he tried to protect it from attacking his pet dog.
The Irish Pit Bull Terrier Association will hand out leaflets to educate people about the breed which has often linked to vicious attacks on children.
An American woman bit a pit bull terrier on the nose to save her pet Labrador.