Source : Webster's Revised Unabridged Dictionary (1913)

Fusiform \Fu"si*form\, a. [L. fusus spindle + -form: cf. F.
   fusiforme.]
   Shaped like a spindle; tapering at each end; as, a fusiform
   root; a fusiform cell.

Source : WordNet®

fusiform
     adj : tapering at each end [syn: {spindle-shaped}, {cigar-shaped}]