pinnato-|pɪˈneɪtəʊ|occasional advb. combining form of L. pinnātus pinnate (cf. pinnati-). piˌnnato-ˈdentatea.[dentate], pinnate, with toothed leaflets; piˌnnato-ˈpectinatea.[pectinate], having lateral projections like the teeth of a comb, arranged pinnately.1806J. Galpine Brit.Bot. 58 L[eaf] linear, pinnato-dentate.1846Dana Zooph. (1848) 578 Branches pinnato-pectinate.