| 单词 |
dendroid |
| 释义 |
dendroid, a.|ˈdɛndrɔɪd|
[f. Gr. δένδρ-ον + -oid: cf. Gr. δενδρώδης, contr. from δενδροειδής.]
Of the form of a tree; dendritic, arborescent.
1846Dana Zooph. (1848) 544 A dendroid specimen in the coral collections of Peale's Museum. 1869Nicholson Zool. 105 Dendroid, or tree-like, corals.
Add:[A.] b. Palæont. Designating or pertaining to graptolites of the order Dendroidea, which form many-branched colonies.
1908R. Ruedemann in Mem. N.Y. State Mus. XI. 59 All these graptolites are dendroid forms which lived under the same conditions as the associated benthonic forms. 1932Borradaile & Potts Invertebrata v. 150 Certain forms, whose relationship is not clear, occur very commonly in the Cambrian and are grouped together as ‘dendroid’ graptolites. 1979D. L. Dineley Fossils iii. 79 The late Cambrian dendroid graptolites..had three distinct kinds of thecae.
B. n. Palæont. A dendroid graptolite.
1912F. F. Hahn in Ann. N.Y. Acad. Sci. XXII. 150 The sediments of those places on which the dendroids actually flourished were not favorable for preserving the delicate graptolites. 1958G. A. Kerkut Borradaile & Potts's Invertebrata (ed. 3) xviii. 718 The dendroids show a branching pattern of uniserate stipes (thecae on one side of the stipe only). 1977A. Hallam Planet Earth 264/1 The earliest graptoloids are referred to a group known as the dendroids, which exhibit cups of differing shapes and developed into shrubby, lace-like colonies of moderate size.., in which the branches were commonly joined by transverse struts. |
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