costard
A large cooking apple.
The tree on which large cooking apples grow.
The human head.
archaic
And then we wil chop him in the malmſey But in the next roome.
Take him ouer the coſtard with the hilts of thy ſword,
Where it comes from
From Middle English costard, perhaps from Old French coste (“rib”) + -ard, in reference to its ribbed appearance.
Adapted from the Wiktionary entry costard (CC BY-SA 4.0).