1. Rounded brimless cap fitting the crown of the head 
2. A herbaceous plant of the genus Scutellaria which has a calyx that, when inverted, resembles a helmet with its visor raised
   - helmetflower 
3. The dome of the skull
   - calvaria

Derived forms: skullcaps

Type of: bone, cap, herb, herbaceous plant, os[2]

Part of: braincase, brainpan, cranium

Encyclopedia: Skullcap

• first cause
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• first cranial nerve
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• first estate