Definition of ameristic in English:

ameristic

Pronunciation /ˌaməˈrɪstɪk/

adjective

Botany
  • Of a gametophyte of a fern: that lacks a meristem, and is capable of producing antheridia only. Contrasted with meristic .

Origin

Late 19th century; earliest use found in Journal of the Royal Microscopical Society. From a- + ancient Greek μεριστός divided, divisible + -ic.