/ˌbaɪroʊˈtɔːrɪ/ or /ˌbaɪroʊˈtɔːri/ (by-oh-TOR-ee)

Definitions

1. adjective

Having or showing a tendency to rotate in two planes, especially in the absence of a rotating axis.

“The birotatory motion of the propeller blades was a key design feature for the aircraft’s stability.”

2. adverb

In a birotatory manner or with a tendency to rotate in two planes.

“The engineer analyzed the birotatorily moving parts of the machine to understand its efficiency.”