Definition

Noun: 1. A type of aquatic plant: The water caltrop is a floating aquatic plant (Trapa natans) that produces a distinctive hard, spiny nut. 2. The edible nut of this plant: The term also refers to the edible seed or fruit of this plant, which resembles a chestnut and is used in cooking, particularly in Asian cuisines.

Usage Examples

• Noun:
  • The lake was covered with the broad leaves of the water caltrop.
  • The recipe called for water caltrop, which added a crunchy, starchy texture to the dish.

Advanced Usage

• Botanical context: In botanical texts, "water caltrop" specifically refers to plants of the genus .
  • The invasive water caltrop can form dense mats that impede water traffic.

Variants and Related Words

• Water chestnut: While often used interchangeably in culinary contexts, "water chestnut" can refer to a different aquatic plant (). The water caltrop is sometimes called the "European water chestnut" or "horn nut."
• Singhara nut: A common name for the water caltrop fruit in South Asia.
• Ling nut: Another name used in some regions.

Synonyms

• Jesuit's nut: An archaic synonym for the water caltrop.
• Bat nut: A descriptive synonym referencing the fruit's wing-like projections.

Notes on Meaning

The primary meaning is the plant or its nut-like fruit. Its distinctive, horned shape is the origin of its common name, as it resembles the metal caltrop, a spiked weapon. It is important to distinguish it from the more common "water chestnut" in precise culinary or botanical discussion, as they are different species.

Noun

1. a variety of water chestnut