[mor.tar.board] n (1854) 1 a: hawk
2. b: a board or platform about three feet (one meter) square for holding mortar
2: an academic cap consisting of a closely fitting headpiece with a broad flat projecting square top
[mor.tar.board] n (1854) 1 a: hawk
2. b: a board or platform about three feet (one meter) square for holding mortar
2: an academic cap consisting of a closely fitting headpiece with a broad flat projecting square top
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012