mortarboard
英 ['mɔːtəbɔːd]
美 ['mɔrtɚ,bord]
英文词源
- mortarboard (n.)
- also mortar-board, "academic cap," 1854, probably from mortar (1) + board (n.1); so called because it resembles a mason's square board for carrying mortar.
Earlier it was called a mortar cap (1680s) or simply morter (c. 1600), from French mortier.