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• -yl

  chemistry a suffix used in the names of radicals: ethyl. -yl suffix (in chemistry) indicating a group or radical methyl, carbonyl word origin from greek hulē wood, matter -yl suff. a monovalent organic acid radical: carbonyl. -yl a suffix used to form the chemical names of organic compounds when they are radicals (parts of larger […]

• -ylene

  -ylene suff. a bivalent organic radical: methylene.

• -yne

  suffix denoting an organic chemical containing a triple bond alkyne word origin alteration of -ine² -yne a suffix used to form the names of hydrocarbons having one or more triple bonds, as in ethyne.

• -zoa

  a combining form meaning “animals,” “organisms” of the kind specified by the initial element, used in the names of cl-sses in zoology: protozoa. -zoa suffix indicating groups of animal organisms metazoa word origin from new latin, from greek zōia, plural of zōion animal, living being

• -zoic

  combining form, combining form indicating a geological era palaeozoic word origin from greek zōē life + -ic -zoic suff. relating to a specified manner of animal existence: holozoic.

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