PINNATELY
pinnately
(adverb) having a pinnate shape; “a pinnately compound leaf”
Source: WordNet® 3.1
Etymology
Adverb
pinnately (comparative more pinnately, superlative most pinnately)
In a pinnate fashion.
Source: Wiktionary
Pin"nate*ly, adv.
Definition: In a pinnate manner.
PINNATE
Pin"nate, Pin"na*ted, a. Etym: [L. pinnatus feathered, fr. pinna a
feather. See Pin a peg, Pen feather.]
1. (Bot.)
Definition: Consisting of several leaflets, or separate portions, arranged
on each side of a common petiole, as the leaves of a rosebush, a
hickory, or an ash. See Abruptly pinnate, and Illust., under
Abruptly.
2. (Zoöl.)
Definition: Having a winglike tuft of long feathers on each side of the
neck. Pinnated grouse (Zoöl.), the prairie chicken.
Source: Webster’s Unabridged Dictionary 1913 Edition