Bible Dictionaries
Trinucleus

Webster's Dictionary

(n.) A genus of Lower Silurian trilobites in which the glabella and cheeks form three rounded elevations on the head.

Bibliography Information
Webster, Noah. Entry for 'Trinucleus'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/trinucleus.html. 1828.