WordReference Random House Unabridged Dictionary of American English © 2026
am•er•is•tic
(am′ə ris′tik, ā′me ris′-),USA pronunciation adj. [Bot.]
am′er•ism, n.
- Botanynot divided into parts;
having no meristem.
- Greek amérist(os) undivided (a- a-6 + meristós divided) + -ic