pinnately--prophetes.ai

pinnately, adv.
  (ˈpɪnətlɪ)
  [f. pinnate + -ly².]
  In a pinnate manner or form: see pinnate 1.

1861 Bentley Man. Bot. 159 Feather-veined or pinnately veined leaves. 1883 [see pinnati-].

Oxford English Dictionary