Definition of parallelogrammatic in English:

parallelogrammatic

adjective

rare
  • Relating to, based on, or having the form of a parallelogram.

Origin

Early 18th century; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist. From parallelogram + -atic, perhaps after grammatic. Compare French parallélogrammatique.

Pronunciation

parallelogrammatic

/ˌparəlɛləɡrəˈmatɪk/