/ Dictionary / Index A avian pneumoencephalitis: Meaning and Definition of Find definitions for: a'vian pneu•mo•en•ceph•a•li'tis Pronunciation: (n"mō-en-sef"u-lī'tis, ny"-), [key] — Vet. Pathol. Vet. Pathol. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. avian leukosis avian pox Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language