Толковый словарь английского языка Oxford English Reference - ide

suffix (also esp. US -id) Chem. forming nouns denoting: 1 binary compounds of an element (the suffix -ide being added to the abbreviated name of the more electronegative element etc.) (sodium chloride; lead sulphide; calcium carbide). 2 various other compounds (amide; anhydride; peptide; saccharide). 3 elements of a series in the periodic table (actinide; lanthanide). Etymology: orig. in OXIDE IDE n. a freshwater fish, Leuciscus idus, used as food. Also called ORFE. Etymology: mod.L idus f. Sw. id