# symplectic

> English word · Adjective · IPA /sɪmˈplɛktɪk/ · frequency rank #94,311

## Definitions
1. Placed in or among, as if woven together.
2. Whose characteristic abelian subgroups are cyclic.
3. That is alternating and nondegenerate.
4. That is equipped with an alternating nondegenerate bilinear form.
5. Of or pertaining to (the geometry of) a differentiable manifold equipped with a closed nondegenerate bilinear form.
6. That moves in the same direction as a system of synchronized waves.
7. Of or pertaining to a symplectite; symplectitic.

## Etymology
A calque of complex, coined by Hermann Weyl in his 1939 book The Classical Groups: Their Invariants and Representations. From Ancient Greek συμπλεκτικός (sumplektikós), from συμ (sum) (variant of σύν (sún)), + πλεκτικός (plektikós) (from πλέκω (plékō)); modelled on complex (from Latin complexus (“braided together”), from com- (“together”) + plectere (“to weave, braid”)).
The symplectic group has previously been called the line complex group.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/symplectic