archipendulum (English, noun)
expansion: archipendulum (plural archipendulums or archipendula)
Senses:
glosses: An ancient device used to measure angles, consisting of an A-shaped device with a plumbline attached to the top vertex and a mark on the midpoint of the crossbar.
Forms:
form: archipendulums
tags: plural
form: archipendula
tags: plural