in·fra

[in-fruh]
adverb
below, especially when used in referring to parts of a text.
Compare supra.


Origin:
1730–40; < Latin infrā; cf. under

Dictionary.com Unabridged

infra-

a prefix meaning “below,” used, with second elements of any origin, in the formation of compound words: infrasonic; infrared.

Origin:
< Latin, representing infrā, adv. or preposition

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To infra
00:10
Infra is always a great word to know.
So is doohickey. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
infra (ˈɪnfrə) [Click for IPA pronunciation guide]
 
adv
(esp in textual annotation) below; further on

infra-
 
prefix
below; beneath; after: infrasonic; infralapsarian
 
[from Latin infrā]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

infra-
from L. infra (adv., prep.) "below, underneath, beneath," from PIE *ndher (cf. Skt. adnah "below," O.E. under "under, among;" see under). Opposed to super-. Its use as a prefix was rare in Latin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

infra- pref.
Inferior to, below, or beneath: infrasonic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Glover's autopsy, see infra, later confirmed that she died from strangulation.
Cranking out freelance articles to pay off one's marquisate bill, however, is unquestionably infra dig.
It acts to amplify infra-red emissions at some frequencies and suppress them at
  others.
Elsewhere, agents have access to mobile lighting units, as well as hand-held
  infra-red cameras akin to night-vision goggles.
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