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caltrop

caltrop

9.9
A water plant with hard spiny fruit that people eat
  • noun
  • /ˈkæltrəp/
translation icon : castaña de agua
  • The spiny fruit of the caltrop is harvested for food in some Asian countries.

Examples

  • The caltrop is often found in shallow water.

  • Some people mistake the dried caltrop seeds for small, dangerous objects due to their shape.

  • Researchers studied how the caltrop adapts to wetlands and slow-moving rivers.

  • I love eating caltrops in my salads.

  • The spiny fruit of the caltrop is harvested for food in some Asian countries.

  • Some people mistake the dried caltrop seeds for small, dangerous objects due to their shape.

  • I love eating caltrop in my salads.

Synonyms

water chestnut
vscaltrop
2 3.0

A plant that grows in water with a crunchy edible part used in Asian cooking

refers specifically to plants of that genus with hard spiny four pronged fruits
Trapa
vscaltrop
  • Specialized
1 9.9

A small water plant with floating leaves and edible seeds used as food

is the common informal name for that same plant group
water caltrop
vscaltrop
9.9

A plant that grows in water and makes a hard horned nut people eat

is a general name for the plant rather than the cultivated crop
water chestnut plant
vscaltrop
  • Specialized
5.6

A water plant with spiky four-part nuts that people eat

highlights the common name rather than focusing on fruit shape
genus Trapa
vscaltrop
  • Specialized
9.9

A group of small water plants that includes the water chestnut

is the common name for plants in that genus rather than the scientific term
Trapa natans
vscaltrop
  • Specialized
8.8

A water plant with floating leaves and hard seeds you can eat

refers to plants of that genus generally rather than one particular species

Compounds

A plant that grows in water and makes a hard horned nut people eat

Surface Forms

caltrop singular
caltrops plural

Etymology

The word caltrop comes from old words meaning 'heel', shown in calx, and 'trap', shown in trap. The water plant makes a hard, four-pointed, spiky fruit that looks like the old weapon, so people called the edible spiky seed a caltrop, which is why the name now refers to this water chestnut.