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-id1

1.
a suffix of nouns that have the general sense “offspring of, descendant of,” occurring originally in loanwords from Greek (Atreid; Nereid), and productive in English on the Greek model, especially in names of dynasties, with the dynasty's founder as the base noun (Abbasid; Attalid), and in names of periodic meteor showers, with the base noun usually denoting the constellation or other celestial object in which the shower appears (Perseid).
Origin
< Latin -id-, stem of -is < Greek: feminine patronymic suffix; or < Latin -idēs < Greek: masculine patronymic suffix

-id2

1.
a suffix occurring in English derivatives of modern Latin taxonomic names, especially zoological families and classes; such derivatives are usually nouns denoting a single member of the taxon or adjectives with the sense “pertaining to” the taxon: arachnid; canid .
Origin
< Greek -idēs -id1, as singular of Neo-Latin -ida -ida or -idae -idae

-id3

1.
variant of -ide: lipid .

-id4

1.
a suffix occurring in descriptive adjectives borrowed from Latin, often corresponding to nouns ending in -or1, : fetid; humid; pallid .
Origin
< Latin -idus
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for -id

-id1

suffix
1.
indicating the names of meteor showers that appear to radiate from a specified constellation: Orionids (from Orion)
2.
indicating a particle, body, or structure of a specified kind: energid
Word Origin
from Latin -id-, -is, from Greek, feminine suffix of origin

-id2

suffix, suffix
1.
indicating members of a zoological family: cyprinid
2.
indicating members of a dynasty: Seleucid, Fatimid
Word Origin
from New Latin -idae or -ida, from Greek -idēs suffix indicating offspring

-id3

suffix
1.
a variant of -ide

-ide

suffix
1.
(added to the combining form of the nonmetallic or electronegative elements) indicating a binary compound: sodium chloride
2.
indicating an organic compound derived from another: acetanilide
3.
indicating one of a class of compounds or elements: peptide, lanthanide
Word Origin
from German -id, from French oxideoxide, based on the suffix of acideacid
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
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Word Origin and History for -id

word-forming element meaning "belonging to, connected with, member of a group or class" (plural -idae), from French -ide and directly from Latin -ides, masculine patronymic, from Greek -ides. In astronomy, of meteor showers, it represents Latin -idis, Greek -idos, the genitive of the feminine patronymic suffix.

Online Etymology Dictionary, © 2010 Douglas Harper
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-id in Medicine

-id suff.
Body; particle: chromatid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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