pinnati-
(pɪˈneɪtɪ, pɪˈnætɪ)
combining form of L. pinnātus pinnate: chiefly in botanical terms relating to leaves (cf. pinnatifid): piˌnnatiˈlobate, piˈnnatilobed (-eɪtɪ-) adjs., pinnately divided with rounded divisions or lobes; piˌnnatiˈpartite (-eɪtɪ-) a. [L. partītus divided: see partite], pinnately divided nearly to the midrib; piˈnnatisect, piˌnnatiˈsected (-eɪtɪ-) adjs. [L. sectus cut: see -sect], pinnately divided quite to the midrib, but not articulated so as to form separate leaflets. See also pinnatiped.
| 1857 Henfrey Bot. §93 We..take the prefix pinnati-..and subjoin to this a word indicating the degree or kind of division, thus: pinnatifid..if the broad notches between the lobes extend from the margin to about half-way between this and the midrib; pinnatisect, if the notches extend on nearly to the midrib; pinnatipartite, if the separate lobes are almost free, and merely connected by a narrow strip of parenchyma. 1861 Bentley Man. Bot. (1870) 153 [Leaves] pinnatipartite, or pinnatisected, according to their depth. 1866 Treas. Bot., Pinnatilobed, Pinnatilobate, when the lobes of a pinnatifid leaf are divided to an uncertain depth. 1883 G. Allen in Nature 8 Mar. 441 Steps by which a regularly pinnately-veined leaf, such as that of the common olive, may pass into a pinnatifid and pinnatisect form by non-development of the mainly cellular tracts. |