calyculus

Thân thiện

A botanist examines the calyculus of a hibiscus flower.

Definition

Noun: 1. A small cup-shaped anatomical structure: A tiny, cup-like formation in a biological organism. This can refer to sensory organs like taste buds, structures in the eye like the optic cup, or the cavities in corals that house individual polyps. 2. An epicalyx (false calyx): In botany, a ring of small, leaf-like bracts (modified leaves) located just below the true calyx (the whorl of sepals) of a flower, giving the appearance of an extra calyx.

Examples

• Anatomical Structure:
  • Each taste bud is a calyculus containing the sensory cells.
  • The coral's skeleton is composed of numerous calyculi, each once housing a living polyp.
• Botanical Structure:
  • The flower of the carnation is noted for the calyculus that surrounds its base.
  • Botanists studied the calyculus of the hibiscus, which resembles a second set of sepals.

Advanced Usage

• Technical/Descriptive: The term is almost exclusively used in specialized scientific contexts (anatomy, zoology, botany) for precise description.
  • The histological slide clearly shows the calyculus of the optic cup.
• Comparative: Used to describe the shape or function of similar small, receptacle-like structures in other contexts by analogy.
  • The fossilized structure had a calyculus form, suggesting it housed a soft-bodied organism.

Variants and Related Words

• Calycle (noun): A direct synonym, often used interchangeably with "calyculus."
• Calycine (adjective): Of, relating to, or resembling a calyx or calyculus.
  • The calycine structures were clearly visible under the microscope.
• Epicalyx (noun): The precise botanical term for the second definition (a group of bracts simulating a calyx).

Synonyms

• Cupule: A small cup-shaped structure or organ.
• Receptacle: (In botany) The part of a flower stalk where the floral parts are attached; more general than calyculus.
• Cup: A simple, non-technical term for the shape.

Notes on Meaning

The word has two distinct, domain-specific meanings: 1. Zoological/Anatomical Meaning: Refers to a protective or encapsulating cup-like cavity (e.g., in corals, taste buds). 2. Botanical Meaning: Refers to a specific set of accessory leaves (bracts) on a flower stem.

Học thuật

Noun

1. a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)
2. a group of bracts simulating a calyx as in a carnation or hibiscus

Từ đồng nghĩa

• caliculus
• calycle
• epicalyx
• false calyx