[mawr-ter-bawrd, -bohrd] 
| 1. | a board, usually square, used by masons to hold mortar. |
| 2. | Also called cap. a cap with a close-fitting crown surmounted by a stiff, flat, square piece from which a tassel hangs, worn as part of academic costume. |
| mor·tar·board (môr'tər-bôrd', -bōrd') n.
|
tərˌbɔrd