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Dictionary » O » Orifice

Orifice

Definition

noun, plural: orifices

An opening or aperture; any external opening in the body of an animal.


Supplement

In a typical mammalian body such as the human body, the body orifices are: nostrils, eyes, mouth, ear canals, anus, urethra, vagina, orifices of nipples, orifices of sweat glands, navel.

Other animals may have some other body orifices: cloaca in birds, reptiles, amphibians, and some other animals, and siphon in mollusca, arthropods, and some other animals.


Word origin: Middle English, from Old French, from Late Latin orificium, compound of os, mouth + -ficium.

Related forms: orificial (adjective).
Related terms:


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... anus Goblet worm Anus inside ring of cilia about 150 Gastrotricha Hair stomach Meiofauna Two terminal adhesive tubes about 690 Gnathostomulida Jaw orifice Jaw worms about 100 Hemichordata Half cord Acorn worms, pterobranchs Stomochord in collar, pharyngeal slits about 100 living species Kinorhyncha ...

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by gamila
Mon Jun 29, 2009 5:35 pm
 
Forum: Evolution
Topic: Why do you keep talking about species
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Threats to estuaries

It's really sad that we've turned one of our biggest ports, and the mouth of our largest river into the nation's excretory orifice. I was thinking about that just the other day, actually, as I was looking at the Mississippi River while visiting New Orleans. I was thinking about the ...

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by alextemplet
Tue Aug 12, 2008 2:58 am
 
Forum: Ecology
Topic: Threats to estuaries
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Threats to estuaries

... against a brick wall. It's really sad that we've turned one of our biggest ports, and the mouth of our largest river into the nation's excretory orifice.

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by AstusAleator
Tue Aug 12, 2008 2:14 am
 
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The Fiber Disease

"backblog" 1. n. verbose detruitus issued from gaping orifice;i.e. mouth 2.adv.to have pages and pages of blog to read. Another Altruism.

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Fri Jan 12, 2007 6:39 am
 
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The Fiber Disease

... develop hapten-specific, cell mediated immune response. Penetration of TiO2 microparticles in sunscreen into the stratum corneum and follicular orifice of hair has been reported (Lademann et al. 1999). Particles reaching the dermis can be transported to the lymphatic system by macrophages and ...

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Thu Aug 24, 2006 12:58 am
 
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