A cretaceous fossil sea urchin of the genus Galerites.
1. ing or continuing through the year; as, perennial fountains. 2. Continuing without cessation or intermission; perpetual; unceasing; never failing. The perennial existence of bodies corporate. Burke. 3. (Bot.) Continuing more than two years; as, a perennial steam, or root, or plant. Syn. -- Perpetual; unceasing; never failing; endurin...