World English Dictionary
a variant of hypo- : hypabyssal

hypo- or (before a vowel) hyp-
1.  under, beneath, or below: hypodermic
2.  lower; at a lower point: hypogastrium
3.  less than: hypoploid
4.  (in medicine) denoting a deficiency or an abnormally low level: hypothyroid; hypoglycaemia
5.  incomplete or partial: hypoplasia
6.  indicating that a chemical compound contains an element in a lower oxidation state than usual: hypochlorous acid
[from Greek, from hupo under]
hyp- or (before a vowel) hyp-
[from Greek, from hupo under]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

hyp- pref.
Variant of hypo-.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
hypo- or hyp-  
A prefix that means "beneath" or "below," as in hypodermic, below the skin. It also means "less than normal," especially in medical terms like hypoglycemia. In the names of chemical compounds, it means "at the lowest state of oxidation," as in sodium hypochlorite.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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