Definition

Noun: * A small, free-floating aquatic plant: "Lesser duckweed" refers to a specific species of very small, simple aquatic plant that floats on the surface of still or slow-moving freshwater bodies. It is characterized by its tiny, oval-shaped green fronds (leaves) and a single root hanging from each frond.

Usage

• The term "lesser duckweed" is used specifically in botany, ecology, and environmental science to identify this particular plant species (). It is often discussed in the context of pond ecosystems, water quality, or as a model organism in plant biology.
• It is a countable noun (e.g., a frond of lesser duckweed, patches of lesser duckweed).

Examples

• Noun:
  • The entire surface of the pond was covered with a dense mat of lesser duckweed.
  • Scientists study lesser duckweed for its rapid growth rate and simple structure.
  • A sudden bloom of lesser duckweed can indicate high nutrient levels in the water.

Advanced Usage

• "Lesser duckweed" as an indicator species: In ecology, the presence or abundance of lesser duckweed is sometimes used as a biological indicator of water conditions, such as eutrophication (excess nutrients).

Variants and Related Words

• Duckweed (n): The common name for the family of plants (Lemnaceae) to which lesser duckweed belongs. "Duckweed" is a more general term.
• Lemna minor (n): The scientific (Latin) name for lesser duckweed.
• Common duckweed (n): Another common name for the same species, .

Synonyms

• Common duckweed: The most direct synonym.
• Lemna minor: The scientific synonym.

Notes on Different Meanings

• The term "lesser" in "lesser duckweed" specifically distinguishes this common species () from other, often larger or less common, species within the duckweed family, such as greater duckweed () or ivy-leaved duckweed (). It does not imply the plant is unimportant.

Noun

1. of temperate regions except eastern Asia and Australia