/ Dictionary / Index P paraformaldehyde: Meaning and Definition of Find definitions for: par•a•form•al•de•hyde Pronunciation: (par"u-fôr-mal'du-hīd", -fur-), [key] — n. Chem. a white, crystalline polymer of formaldehyde, (HCOH), from which it is obtained by evaporation of the aqueous solution: used chiefly as an antiseptic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parafoil paragenesis Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language