helmet /helˈmit/ or (archaic or poetic) helm

1. A covering of armour for the head
2. Any similar protective covering for the head
3. Anything resembling a helmet, such as a cloud on a mountain top, the top of a guinea-fowl's head, the hooded upper lip of certain flowers

helˈmeted or (archaic or poetic) helmed adjective

helˈmet-shell noun

A gastropod of the genus Cassis, having a thick heavy shell with bold ridges

• trigging
• triglot
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• triglyceride
• triglycerides
• triglyph
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• trigness
• trignesses
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• trigonal
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• trigonic
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• trigonometrical points
• trigonometric function
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• trigonometries