emic unit
anything that comes under any of the various linguistic concepts named by names ending in "-eme", such as phoneme or morpheme
morpheme
smallest linguistic unit within a word that can carry a meaning
postfix
type of morpheme
constituent
word or a group of words that functions as a single unit within a hierarchical structure
grapheme
smallest semantically distinguishing unit in a written language
toneme
basic unit of lexical tone by analogy of a phoneme
tagmeme
primitive grammatical feature
tagmeme
grammatical unit
phoneme
basic unit of phonology
mora
phonological unit