/ Dictionary / Index P pyroxylin: Meaning and Definition of Find definitions for: py•rox•y•lin Pronunciation: (pī-rok'su-lin, pu-), [key] — n. a nitrocellulose compound containing fewer nitrate groups than guncotton, used in the manufacture of artificial silk, leather, oilcloth, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pyroxylin (Thesaurus) pyroxenite pyrrhic Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language