noun Date: 1855 seesaw 2b, a board placed on a raised support so that a person standing on one end of the board is thrown into the air if another jumps on the opposite end
TEETERBOARD
Meaning of TEETERBOARD in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012