Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

-id2

Forming nouns.

[Either French -ide, via Latin -idis, or Latin -ides, in both cases derived from Greek.]

This ending forms the names of some plants whose family name ends in -aceae (orchid, family Orchidaceae); of some animals whose taxonomic name ends in -idae (felid, a mammal of the cat family, Felidae; noctuid, a moth of the family Noctuidae); or of plants or animals in classes whose name ends in -ida (arachnid, a member of the class Arachnida).

It is also used to form the names of structural constituents in biology (chromatid, each of the two thread-like strands into which a chromosome divides during cell division; plasmid, a genetic structure in a cell that can replicate independently of the chromosomes).

In astronomy it can denote a meteor in a shower radiating from a specified constellation (Geminids, from Gemini; Leonids, from Leo); a cepheid is a variable star like the first one observed, Delta Cephei.

The ending can also indicate a member of a dynasty or family (Abbasid, a member of a dynasty of caliphs who ruled in Baghdad from 750 to 1258; Sassanid, a member of a dynasty that ruled Persia from the early 3rd century AD until the Arab Muslim conquest of 651).

See also -oid.

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