A solitary or colonial sedentary form of a coelenterate such as a sea anemone, typically having a columnar body with the mouth uppermost surrounded by a ring of tentacles. In some species, polyps are a phase in the life cycle which alternates with a medusoid phase.Compare with medusa
- ‘Instead, many used a scenario approach to conclude that solitary sessile polyps represent the ancestral cnidarian form.’
- ‘Do polyps of other cnidarian species have a tissue dynamics similar to that of hydra?’
- ‘A few, such as Hydra, are solitary polyps that lack a medusoid stage.’
- ‘Finally solitary polyps or medusae may clone to produce more of their kind.’
- ‘Most hydrozoans alternate between a polyp and a medusa stage - they spend part of their lives as ‘jellyfish’ which are hard to distinguish from scyphozoan jellyfish.’
A small growth, usually benign and with a stalk, protruding from a mucous membrane.
tumour, cancerous growth, malignant growth, malignancy, cancerView synonyms
- ‘The laser can also provide relief for symptoms caused by benign airway tumors such as hamartomas, papillomas, polyps, and angiomas.’
- ‘What's more, most tumors start out as polyps, or benign growths, in the colon.’
- ‘Screening for and removal of colorectal cancer and precancerous adenomatous polyps can decrease the incidence of colon disease.’
- ‘Growths such as polyps or fibroids can often be removed and endometriosis can often be treated with medications or surgery.’
- ‘Colonoscopy revealed diverticulitis and several benign polyps, which were excised.’
Late Middle English (in polyp (sense 2)): from Old French polipe, from Latin polypus (see polypus). polyp (sense 1) dates from the mid 18th century.
We take a look at several popular, though confusing, punctuation marks.