ENVELOPE

n. A3n've2l-op. Lat., in tegu mentum. Fr., enveloppe. Ger., Decke. It., invoglio, inviluppo. Sp., envolvedero, cubierta. An investing membrane, sheet, or layer. Floral e's. Lat., integument a floral i a. Fr., envelop pes florales. Ger., Bliithendecke. The protective coverings of a flower, consisting of the calyx and corolla; called collectively the perianth or perigone. [B, 77, 121, 123 (a, 24).] Foetal e's. Lat., velamenta ovi, velamina infant is. Fr., envelop pes de Vceuf(ou du foetus). Ger., Eihiillen des Fotus. It., inviluppi fetal i. Sp., membranas cobertoras del feto. Syn.: foetal membranes. The membranes that envelop the foetus; the cnorion and the amnion. [A, 11.] Medullary e. Ft., enveloppe medulla ire. The medullary sheath of a nerve-fibre. [J, 83.] Nuclear e. See Nuclear MEMBRANE. Serous e. of the vn in. Of von Baer, the subzonal membrane. [s. 719]