资料来源 : pyDict

三核属

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.