Definition of labile

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< labiate

labio- >

la·bile    (lbl, -bl) KEY 

ADJECTIVE:

1. Open to change; adaptable: an emotionally labile person.
2. Chemistry Constantly undergoing or likely to undergo change; unstable: a labile compound.

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ETYMOLOGY:
Middle English labil, forgetful, wandering, from Old French labile, from Late Latin lbilis, apt to slip, from lb, to slip

OTHER FORMS:
la·bili·ty  (-bl-t) KEY (Noun)