| 释义 |
cladus|ˈkleɪdəs|
Pl. cladi.
[mod.L., a. Gr. κλάδος branch.]
One of the secondary arms or branches of a ramose sponge spicule. Hence ˈcladal, ˈcladose adjs.
1887Sollas in Encycl. Brit. XXII. 416/2 The spicular rays..usually pointed (oxeate) at the ends..are also frequently..branched (cladose). 1888― in Challenger Rep. XXV. p. lvi, The proximal or undivided part of a cladus is..distinguished as the protocladus, the distal division, in the case of a dichotomous cladus as the deuterocladus. Ibid., A straight line drawn from the cladal origin to the end of a cladus is taken as its length. 1940[see cladome]. |