Basic Guidelines For English Spellings
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1rare Of, relating to, or characterized by a monastic or prison cell.
2Originally: of a cellular or porous nature (now rare). In later use: (Biology) composed of or containing tissue cells; = "cellular"; (Medicine) derived from tissue cells.
Early 17th century; earliest use found in Samuel Daniel (?1563–1619), poet and historian. From classical Latin cellula + -ary.