pinniform, a.
(ˈpɪnɪfɔːm)
Also incorrectly pinnæform.
[f. pinni- + -form, where see note.]
a. Having the form of, or resembling, a fin. b. Having the form of, or resembling, a feather: = penniform. c. Of a pinnate form. d. Resembling the mollusc called Pinna (Pinna1).
| 1752 J. Hill Hist. Anim. 313 The Balæna, with..a pinniform tuberosity on the back. 1821 W. P. C. Barton Flora N. Amer. I. 43 Leaves..often inclining to be pinnatifid; the pinnæform segments arcuate. 1858 Mayne Expos. Lex., Pinniformis, Ornithol., applied to wings in the form of fins that are covered by thickly laid up feathers,..and which serve only as organs of natation: pinniform. |