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; cell : c.1131, "small room," from L. cella "small room, hut," related to L. celare "to hide, conceal," from PIE base *kel- "conceal" (cf. Skt. cala "hut, house, hall;" Gk. kalia "hut, nest," kalyptein "to cover," koleon "sheath," kelyphos "shell, husk;" L. cella "store room," clam "secret;" O.Ir. cuile "cellar," celim "hide," M.Ir. cul "defense, shelter;" Goth. hulistr "covering," O.E. heolstor "lurking-hole, cave, covering," Goth. huljan "cover over," hulundi "hole," hilms "helmet," halja "hell," O.E. hol "cave," holu "husk, pod"). Earliest sense is for monastic rooms, then prison rooms (1722). Used in Biology 17c., but not in modern sense until 1845. Meaning "small group of people working within a larger organization" is from 1925. Cellphone is from 1984. ;

; membrane : 1519, "parchment," from L. membrana "parchment," from membrum "limb, member of the body" (see member). The etymological sense is "that which covers the members of the body." Meaning "thin layer of skin, tissue covering a limb or organ" is attested from 1601.

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17y ago

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