Etymology From acro- + static. Adjective acrostatic (not comparable) (linguistics) In Proto-Indo-European athematic nominals, having a specific pattern of ablaut in which the accent is placed on the root syllable in all cases. The Proto-Indo-European word for ‘night’ was acrostatic: nominative singular *nókʷ-t-s, genitive *nékʷ-t-s. Synonyms acrodynamic Coordinate terms amphikinetic hysterokinetic proterokinetic