a·phid

[ey-fid, af-id]
noun
any of numerous tiny soft-bodied insects of the family Aphididae of worldwide distribution, that suck the sap from the stems and leaves of various plants, some developing wings when overcrowding occurs: an important pest of many fruit trees and vegetable crops.
Also called plant louse.


Origin:
1880–85; back formation from aphides, plural of aphis

a·phid·i·an [uh-fid-ee-uhn] , adjective, noun
a·phid·i·ous, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To aphid
00:10
Aphid is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
a chattering or flighty, light-headed person.
Collins
World English Dictionary
aphid (ˈeɪfɪd) [Click for IPA pronunciation guide]
 
n
greenfly See also blackfly Also called: plant louse any of the small homopterous insects of the family Aphididae, which feed by sucking the juices from plants
 
[C19: back formation from aphides, plural of aphis]
 
aphidian
 
adj, —n
 
a'phidious
 
adj

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

aphid
1884, Anglicized from Mod.L. aphides, pl. of aphis, coined by Linnaeus (1758), though where he got it and why he applied it to the plant louse are mysteries. The theory favored by OED as "least improbable" is that it derives from the pl. of Gk. apheides "unsparing, lavishly bestowed," in ref. either
to the "prodigious rate of production" of the insects or their voracity. They also are known as ant-cows.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Several aphid species migrate during leaf colour changes.
To reduce food sources for ants, keep aphid and whitefly populations under
  control.
Tests for resistance to the bird cherry-oat aphid were conducted among four
  wheat and eight triticale lines.
But for the generally defenceless pea aphid, mammal breath means only one
  thing: drop or die.
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