apophysis

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apophysis
1. In vertebrates, a projection from a bone, usually for muscle attachment. VERTEBRAE have pairs of apophyses.

2. In echinoids, an internal projection from one of the interambulacral plates (see INTERAMBULACRUM) around the peristome; apophyses serve for the attachment of the muscles supporting the Aristotle's lantern.

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apophysis In the sporophyte of mosses (Musci), a swollen region between the seta and capsule. Its cells are rich in chloroplasts and it contributes to the nourishment of the sporangium.

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apophysis (pl. apophyses)
1. An irregular or sheet-like vein or dyke which originates from a larger igneous rock body.

1. See VERTEBRA.

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apophysis (ă-pof-i-sis) n. a protuberance of bone to which a tendon is attached. a. cerebri the pineal gland.
apophyseal adj.