caryopsis

/,kæri'ɔpsis/

Thân thiện

A single caryopsis falls from a ripe wheat stalk.

Definition

1. Noun:
   • A small, dry, one-seeded fruit in which the seed coat is fused with the fruit wall, characteristic of grasses and cereals. It is indehiscent, meaning it does not split open at maturity to release the seed.

Usage

• The term caryopsis is a specialized botanical term. It is used to describe the specific type of fruit produced by plants in the grass family (Poaceae), which includes important cereal crops.
• It is typically used in scientific, agricultural, and botanical contexts rather than in everyday conversation.

Examples

• Noun:
  • The grain of wheat is a caryopsis.
  • Botanists classify the fruits of rice, oats, and barley as caryopses.
  • A key characteristic of a caryopsis is the fusion of the pericarp (fruit wall) and the testa (seed coat).

Advanced Usage

• The plural form is caryopses (pronounced /ˌkær.iˈɒp.siːz/) or caryopsides (/ˌkær.iˈɒp.sɪˌdiːz/), though "caryopses" is more common in modern English.
• In grain processing, the term may be used to discuss milling, as the fused nature of the caryopsis affects how the bran (outer layers) is separated from the endosperm (starchy part).

Variants and Related Words

• Grain: This is the common, non-technical term for the caryopsis of a cereal grass, especially when referring to it as a food source or a harvested product.
• Achene: A general term for a small, dry, one-seeded fruit that does not open at maturity. A caryopsis is a specific type of achene found in grasses where the seed coat is fused to the fruit wall.

Synonyms

• Grain (in the context of cereal crops).
• Kernel (often used for the edible part of a cereal caryopsis).

Notes on Different Meanings

• The word caryopsis has a single, precise meaning in botany. It does not have other common definitions or metaphorical uses.

Học thuật

Noun

1. dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn

Từ đồng nghĩa

• grain