Xerophthalmia - definition of xerophthalmia by . . . - The Free Dictionary Define xerophthalmia xerophthalmia synonyms, xerophthalmia pronunciation, xerophthalmia translation, English dictionary definition of xerophthalmia n Extreme dryness and thickening of the conjunctiva, often resulting from a deficiency of vitamin A xer′oph·thal′mic adj American Heritage® Dictionary of
Xylem - definition of xylem by The Free Dictionary Define xylem xylem synonyms, xylem pronunciation, xylem translation, English dictionary definition of xylem n The tissue of vascular plants that conducts water and minerals, provides support, and consists of tracheary elements and parenchyma cells