Nounwater caltrop (esp. Trapa japonica); water chestnut · caltrop (weapon)

Noun, Noun which may take the genitive case particle 'no'rhombus; rhomb; lozenge; diamond (shape)

Nounrhombus-shaped mochi

Noun, Noun which may take the genitive case particle 'no'rhombencephalon; hindbrain

Nounwater chestnut flower; water caltrop flower