incumbent. adj. 1. (often: postpositive and foll by on or upon and an infinitive) morally binding or necessary; obligatory: it is incumbent on me to attend.
Morphea, also known as localized scleroderma, is a condition which causes hardening and discoloration of the skin. It is thought to be isolated to the skin without internal organ involvement as seen in systemic sclerosis (commonly known as scleroderma).
morpheme (plural morphemes) (linguistic morphology) A smallest linguistic unit within a word that can carry a meaning, such as un-, break, and -able in the word unbreakable. The word pigs consists of two morphemes: pig (a particular animal) and s (indication of the plural).