Fusedwall colony see fixedwall colony

fusiform a. [L. fusus, spindle; forma, shape] 1. Spindle-shaped, tapering almost equally toward both ends. 2. (MOLL: Gastropoda) Of or pertaining to univalves having a long canal and an equally long spire, tapering from the middle toward both ends.

fusion n. [L. fusus, spindle] A joining together of adjacent structures, parts or sclerites.

fusion layer (MOLL: Bivalvia) That part of the ligament secreted by the mantle.

fusoid a. [L. fusus, spindle] Spindle-shaped; fusiform.

fusulae, fusules n.pl. [L. dim. fusus, spindle] (arthro) Minute upright cylinders with a tapering spine on the base of the spinnerets; the spinning tubes of the silk glands in various arthropods.

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