‖ bivium Phys.
(ˈbɪvɪəm)
[a. L. bivium a place where two ways meet; see prec.]
The two hinder ambulacra of Echinoderms.
| 1870 [see trivium 2]. 1877 Huxley 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. |