teeterboard

[ tee-ter-bawrd, -bohrd ]
/ ˈti tərˌbɔrd, -ˌboʊrd /

noun

a seesaw; teeter.
a similar board used by acrobats and tumblers that propels a person into the air when another person jumps onto the opposite end.

Origin of teeterboard

An Americanism dating back to 1835–45; teeter + board
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019