alcyon

alcyon — noun

1. a small marine animal with a soft, leathery outer surface that lives in colonies

1.noun
Definition

a small marine animal with a soft, leathery outer surface that lives in colonies attached to rocks or the sea floor, belonging to the genus Alcyonium or related groups

Example

Lucía collected samples of alcyons for her marine biology class in Bali.

countable noun, used with quantifier 'samples of'

The tide pool was full of alcyons, their soft bodies moving in the water.

plural form describing a group in a natural habitat

Common collocations
  • colony of alcyons
  • alcyon habitat
  • alcyon species
  • soft-bodied alcyon

Usage Note

Often used in the plural form (alcyons) when referring to individual animals or a collection. In scientific texts, the singular refers to one specimen or to the genus as a concept.

Synonym discussion

Sense: noun/1

Alcyon, coral, gorgonian, and sea anemone are all marine animals in the phylum Cnidaria, but they differ in body structure. Most corals build a hard, stony skeleton of calcium carbonate — these are the animals that form tropical reefs. Alcyons, by contrast, have a soft, leathery body with no hard skeleton, so they do not build reefs. Gorgonians (often called sea fans or sea whips) are also soft corals, but they have a stiff, horny internal support that alcyons lack. Sea anemones are solitary animals that attach to rocks with a single base and have no branching colony structure at all. For example: 'The hard corals built the reef framework, while alcyons grew as soft cushions in the gaps between them.'

coral ↗gorgoniansea anemone

Common collocations

Nouns

  • alcyon colony
  • alcyon species
  • alcyon habitat
  • alcyon reef
  • alcyon specimen

Etymology

GreekLatinEnglish

The name comes from scientific Latin Alcyonium, which was taken from ancient Greek alkyoneion — a type of sea creature named after the kingfisher (alkyōn), because people thought the coral's nest-like shape resembled a kingfisher's nest.

First known use

1862

1862, in the meaning defined above