1560s, from Latin fascia "a band, bandage, swathe, ribbon," derivative of fascis "bundle" (see fasces). In English, originally in architecture; anatomical use is from 1788. Also used in botany, music, astronomy. Related: Fascial; fasciation.
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Definitions of facia from WordNet
a sheet or band of fibrous connective tissue separating or binding together muscles and organs etc;