| 释义 |
bipinnate, a.|baɪˈpɪneɪt|
[ad. mod.L. bipinnātus: see bi- prefix2 3 and pinnate, f. pinna wing.]
1. Doubly or subordinately pinnate; see quot.
1794Martyn Rousseau's Bot. xxi. 301 The leaves are doubly winged or bipinnate. 1872Oliver Elem. Bot. i. vii. 77 A leaf becomes twice pinnate (bi-pinnate) when the common petiole, instead of bearing leaflets, bears secondary petioles upon which the leaflets are pinnately arranged.
2. Zool. Having feathery appendages in opposed pairs.
1856–8W. Clark Van der Hoeven's Zool. II. 63 Tail..without spur, bipinnate above. 1868Wright Ocean World vi. 142 Pennatula..with polypes on bipinnate wings. |