culm

/kʌlm/

Thân thiện

A farmer examines the sturdy culm of a wheat plant in the field.

Definition

1. Noun:
   • The jointed stem of a grass or sedge: In botany, "culm" specifically refers to the hollow or pithy, jointed stem characteristic of plants in the family Poaceae (grasses) and some related families like Cyperaceae (sedges). It is the structure that supports the leaves and inflorescence.

Usage

• Noun:
  • The primary meaning is botanical. It is used to describe the specific stem type of grasses, bamboo, and sedges.
  • It is a technical term most commonly found in scientific, agricultural, or horticultural contexts.

Examples

• Noun:
  • Bamboo has a remarkably strong and fast-growing culm.
  • The farmer examined the wheat culms for signs of disease.
  • In grasses, the nodes on the culm are where leaves are attached.

Advanced Usage

• "Culmiferous" (adj): Producing or bearing culms.
  • The culmiferous nature of these plants makes them ideal for thatching.
• "Culminal" (adj): Relating to or situated at the top of a culm.
  • The culminal flowers of the grass were just beginning to open.

Variants and Related Words

• Culm (noun, historical/geological): An archaic or regional term for anthracite coal waste or inferior coal. (Note: This is a separate, homographic word with a different etymology and meaning, not a variant of the botanical term).
  • The old mining town was surrounded by piles of culm.

Synonyms

• Stem (general): The main structural axis of a plant.
• Haulm (chiefly British): A stem or stalk, especially of peas, beans, or potatoes; sometimes used for grasses but less technically specific than "culm".
• Cane (specific): The hollow, jointed stem of plants like bamboo or rattan, which is a type of culm.

Notes on Usage

• The word "culm" is highly specialized. In everyday language, "stem" or "stalk" is used for most plants. "Culm" is reserved for the specific morphology of grasses and sedges.
• Be aware of the homograph "culm" referring to coal waste, which is unrelated to the botanical term. Context is essential for distinguishing them.

Học thuật

Noun

1. stem of plants of the Gramineae