Found 1 items, similar to Trinucleus.
English → English (gcide) Definition: Trinucleus Trinucleus \Tri*nu"cle*us\, n. [Pref. tri- + nucleus.] (Paleon.) A genus of Lower Silurian trilobites in which the glabella and cheeks form three rounded elevations on the head. [1913 Webster]