athematic

[ey-thee-mat-ik]

adjective

inflected without a thematic vowel.

Origin of athematic

First recorded in 1890–95; a-⁶ + thematic

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for athematic

Historical Examples of athematic

In the verb the athematic conjugation has disappeared and the distinction of primary and secondary endings is not observed.
Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5
Various

British Dictionary definitions for athematic

athematic

adjective

music not based on themes
linguistics (of verbs) having a suffix attached immediately to the stem, without an intervening vowel

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012