| 释义 |
‖ bivium Phys.|ˈbɪvɪəm|
[a. L. bivium a place where two ways meet; see prec.]
The two hinder ambulacra of Echinoderms.
1870[see trivium 2]. 1877Huxley Anat. Inv. An. ix. 570 It is possible in any of the Echinidea, to separate the three anterior ambulacra, as the trivium, from the two posterior, the bivium; and in the fossil genus Dysaster, this separation of the ambulacra into trivium and bivium exists naturally. |