key course
Building and Architecture (now rare )
noun
A course containing a keystone or consisting of keystones.
Origin
Early 18th century.
- perpetual spinach
- perpetual student
- perpetuana
- perpetuance
- perpetuano
- perpetuate
- perpetuation
- perpetuative
- perpetuator
- perpetuity
- perpetuous
- perpetuously
- perpetuum mobile
- perphenazine
- Perpignan
- perplex
- perplexability
- perplexed
- perplexedly
- perplexedness
- perplexer
- perplexing
- perplexingly
- perplexion
- perplexity