skullcap
Concise Oxford English Dictionary © 2008 Oxford University Press:
skullcap/ˈskʌlkap/
▶noun
- 1 a small close-fitting peakless cap or protective helmet.
- 2 the top part of the skull.
- 3 a plant of the mint family, whose tubular flowers have a helmet-shaped cup at the base. [Genus Scutellaria.]
'skullcap' also found in these Oxford entries:

