What is the meaning of -ida?

Now used principally to form taxonomic names at the ranks of class and order and ranks formed by prefixes applied to class and order, often originating as names of orders

feminine singular of -it

Reflexive verb ending.

romanization of -𐌹𐌳𐌰

-ide

1. any of a group of related compounds - azide, polysaccharide, glycoside
2. a binary compound - bromide, arsenide, palladide

any of a group of related compounds - azide, polysaccharide, glycoside

a binary compound - bromide, arsenide, palladide

inflection of -idus:

1. nominative/vocative feminine singular
2. nominative/accusative/vocative neuter plural

nominative/vocative feminine singular

nominative/accusative/vocative neuter plural

ablative feminine singular of -idus

used to form abstract nouns from adjectives

alternative form of -id (“-ide”)

feminine singular of -ido

Source: wiktionary.org