ˈnaviform,a.rare. [f. L. nāvi-s + -form.] Boat-shaped; navicular. 1816G. S. Faber Orig. Pagan Idol. II. 280 The naviform leaf of the Indian fig-tree.1817― Eight Dissert. (1845) II. 199 In the sphere, the Moon or Naviform Lunar Crescent was the astronomical representative of the Ark.