hypophysis

Definitions

  • WordNet 3.6
    • n hypophysis the master gland of the endocrine system; located at the base of the brain
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Webster's Revised Unabridged Dictionary
    • Hypophysis (Med) Cataract.
    • Hypophysis (Anat) See Pituitary body, under Pituitary.
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Century Dictionary and Cyclopedia
    • n hypophysis The pituitary body of the brain, which is lodged in the sella turcica of the sphenoid bone, and attached to the tuber cinereum of the brain by the infundibulum. It occurs in all vertebrates except Amphioxus. It does not appear to be of true nervous tissue, and its function, if any, is unknown. The name is correlated with epiphysis as a name of the conarium. More fully called hypophysis cerebri. See second cut under brain.
    • n hypophysis In bot: In angiosperms, the layer of cells in the embryo resulting from the successive fission of the penultimate cell of the suspensor, which gives rise to the primary root and root-cap.
    • n hypophysis In mosses, an enlargement of the pedicel at the base of the capsule. Also called, less correctly, apophysis. See cut under Andreæa.
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Chambers's Twentieth Century Dictionary
    • n Hypophysis hī-pof′i-sis the pituitary body of the brain:
    • n Hypophysis hī-pof′i-sis (bot.) an inflated part of the pedicel under the capsule, in mosses; in flowering plants, a cell of the embryo producing the primary root and root-cap.
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Etymology

Webster's Revised Unabridged Dictionary
NL., fr. Gr. under + nature, origin
Chambers's Twentieth Century Dictionary
Gr. hypo, under, phyein, to grow.

Usage

In literature:

Beard put forward also the ingenious theory that the hypophysis represents the old Annelidan mouth.
"Form and Function" by E. S. (Edward Stuart) Russell
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