BIVIUM
Source: 567
‖Biv″i‐um (�), n. [[L., a place with two ways. See Bivious.]] (Zoöl.) One side of an echinoderm, including a pair of ambulacra, in distinction from the opposite side (trivium), which includes three ambulacra.
Source: 567
‖Biv″i‐um (�), n. [[L., a place with two ways. See Bivious.]] (Zoöl.) One side of an echinoderm, including a pair of ambulacra, in distinction from the opposite side (trivium), which includes three ambulacra.