sub-


a prefix occurring originally in loanwords from Latin (subject; subtract; subvert; subsidy); on this model, freely attached to elements of any origin and used with the meaning “under,” “below,” “beneath” (subalpine; substratum), “slightly,” “imperfectly,” “nearly” (subcolumnar; subtropical), “secondary,” “subordinate” (subcommittee; subplot).
Chemistry.
  1. a prefix indicating a basic compound: subacetate; subcarbonate; subnitrate.
  2. a prefix indicating that the element is present in a relatively small proportion, i.e., in a low oxidation state: subchloride; suboxide.

Origin of sub-

< Latin, combining form representing sub (preposition); akin to Greek hypó; see hypo-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for sub-

sub-


prefix

situated under or beneathsubterranean
secondary in rank; subordinatesubeditor
falling short of; less than or imperfectlysubarctic; subhuman
forming a subdivision or subordinate part of a wholesubcommittee
(in chemistry)
  1. indicating that a compound contains a relatively small proportion of a specified elementsuboxide
  2. indicating that a salt is basic saltsubacetate

Word Origin for sub-

from Latin sub
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for sub-

sub-


pref.

Below; under; beneath:subcutaneous.
Subordinate; secondary:subinfection.
Subdivision:subkingdom.
Less than completely or normally; nearly; almost:subfertility.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for sub-

sub-


A prefix that means “underneath or lower” (as in subsoil), “a subordinate or secondary part of something else” (as in subphylum.), or “less than completely” (as in subtropical.)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.