/ Dictionary / Index A acanthology: Meaning and Definition of Find definitions for: ac•an•thol•o•gy Pronunciation: (ak"un-thol'u-jē), [key] — n. Biol. the study of spines, as in sea urchins or certain spiny-headed worms, particularly as they relate to taxonomic classification. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acanthoid acanthopterygian Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language