AMBULACRUM

ambulacrum

(noun) one of the five areas on the undersurface of an echinoderm on which the tube feet are located

Source: WordNet® 3.1


Etymology

Noun

ambulacrum (plural ambulacrums or ambulacra)

(of an echinoderm) A row of pores for the protrusion of appendages such as tube feet.

Source: Wiktionary


Am`bu*la"crum, n.; pl. Ambulacra. Etym: [L., an alley or covered way.] (Zoƶl.) (a) One of the radical zones of echinoderms, along which run the principal nerves, blood vessels, and water tubes. These zones usually bear rows of locomotive suckers or tentacles, which protrude from regular pores. In star fishes they occupy the grooves along the under side of the rays. (b) One of the suckers on the feet of mites.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

29 January 2025

SEX

(noun) all of the feelings resulting from the urge to gratify sexual impulses; ā€œhe wanted a better sex lifeā€; ā€œthe film contained no sex or violenceā€


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Coffee Trivia

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