polyp

/'pɔlip/ Cách viết khác : (polype) /'pɔlip/

Thân thiện

A marine biologist observes a coral polyp under a magnifying glass.

Definition

1. Noun:
   • A sedentary form of coelenterate: A polyp is one of the two principal body forms of coelenterates (like hydras or corals). It is typically attached to a surface and has a hollow, cylindrical body with a mouth surrounded by a ring of tentacles.
   • A life cycle phase: In some coelenterate species, the polyp is a stage in the life cycle that alternates with a free-swimming medusa stage.
   • A small abnormal growth: In medicine, a polyp is a small, usually benign, growth projecting from a mucous membrane, such as inside the nose or colon.

Usage Examples

• Biology:
  • Coral reefs are built by colonies of tiny polyps.
  • The life cycle of many jellyfish includes both a polyp and a medusa phase.
• Medicine:
  • The doctor discovered a nasal polyp during the examination.
  • Colonoscopies are performed to screen for potentially cancerous polyps.

Advanced Usage

• "Sessile polyp": Refers to a polyp that is directly attached to the tissue by a broad base, without a stalk.
  • Sessile polyps in the colon can be more challenging to remove completely.
• "Pedunculated polyp": Describes a polyp that is attached to the tissue by a narrow stalk.
  • The pedunculated polyp was easily removed during the procedure.

Variants and Related Words

• Polypoid (adj): Resembling or characteristic of a polyp.
  • The lesion had a polypoid appearance.
• Polyposis (n): A medical condition characterized by the presence of multiple polyps.
  • Familial adenomatous polyposis is a hereditary disorder.

Synonyms

• Zooid (in a biological colonial context): An individual animal that is part of a connected colony, like a coral polyp.
• Growth, nodule, tumor (in a medical context, though these terms have broader and sometimes more serious connotations).

Related Phrases

• "Adenomatous polyp": A specific type of polyp with gland-like structure that has a potential to become cancerous.
  • An adenomatous polyp is considered a precursor to colon cancer.
• "Hyperplastic polyp": A common, typically benign type of polyp.
  • Hyperplastic polyps are usually not a cause for concern.

Idioms

(This word is primarily scientific/medical and is not commonly used in idiomatic expressions.)

Học thuật

Noun

1. one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth
   • in some species of coelenterate, polyps are a phase in the life cycle that alternates with a medusoid phase
2. a small vascular growth on the surface of a mucous membrane

Từ đồng nghĩa

• polypus