water caltrop; water chestnut; caltrop (weapon)
rhombus; rhomb; lozenge; diamond shape
flower-shaped family crest
caltrop (spiked device scattered to maim infantry and horses); calthrop; caltrap
caltrop (spiked device scattered to maim infantry and horses); calthrop; caltrap
California poppy (Eschscholzia californica); golden poppy
caltrop (Tribulus terrestris); cat's head; devil's thorn; devil's weed; goathead; land caltrop
groundhopper (esp. species Tetrix japonica)
groundhopper (esp. species Tetrix japonica)
Red Crystal (politically and religiously neutral emblem used by the International Committee of the Red Cross)
rhombencephalon; hindbrain
white diamond shape; white diamond signal shape (marine safety context)
smithsonite; zinc spar; szaskaite; calamine; dry-bone ore
stitching chisel; pricking iron; multi-prong punch for leather-craft
bean goose (Anser fabalis)
water caltrop (Trapa natans); water chestnut; caltrop
Trapa incisa (species of plant closely related to the water caltrop)