biacuminate--prophetes.ai

biacuminate, a.
  (baɪəˈkjuːmɪnət)
  [f. bi- prefix² 1, 2 + acuminate.]
  (See quot.)

1880 Gray Bot. Text-bk. 398 Biacuminate, two-pointed, as malpighiaceous hairs, fixed by the middle and tapering to each end.

Oxford English Dictionary