- order Exocycloida
- nounflat sea urchins• Syn: ↑Exocycloida• Hypernyms: ↑animal order• Member Holonyms: ↑Echinoidea, ↑class Echinoidea• Member Meronyms: ↑sand dollar
Useful english dictionary. 2012.
order Exocycloida
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Exocycloida — noun flat sea urchins • Syn: ↑order Exocycloida • Hypernyms: ↑animal order • Member Holonyms: ↑Echinoidea, ↑class Echinoidea • Member Meronyms: ↑ … Useful english dictionary
animal order — noun the order of animals • Hypernyms: ↑order • Hyponyms: ↑Eubacteriales, ↑order Eubacteriales, ↑Pseudomonadales, ↑order Pseudomonadales, ↑Rickettsiales, ↑order … Useful english dictionary
class Echinoidea — noun sea urchins and sand dollars • Syn: ↑Echinoidea • Hypernyms: ↑class • Member Holonyms: ↑Echinodermata, ↑phylum Echinodermata • Member Meronyms: ↑ … Useful english dictionary
Echinoidea — noun sea urchins and sand dollars • Syn: ↑class Echinoidea • Hypernyms: ↑class • Member Holonyms: ↑Echinodermata, ↑phylum Echinodermata • Member Meronyms: ↑ … Useful english dictionary
sand dollar — noun flattened disklike sea urchins that live on sandy bottoms • Hypernyms: ↑sea urchin • Member Holonyms: ↑Exocycloida, ↑order Exocycloida * * * noun, pl ⋯ lars [count] US : the round, flat shell of a small sea animal; also : the small sea… … Useful english dictionary
cake urchin — noun Etymology: so called from the disklike shape : a strongly flattened sea urchin (order Exocycloida): as a. : sand dollar b. : keyhole urchin … Useful english dictionary
clypeastrina — əˈstrīnə, rēnə noun plural Usage: capitalized Etymology: New Latin, from Clypeaster + ina : a suborder of sea urchins (order Exocycloida) comprising a large number of flattened more or less discoidal sea urchins (as the cake urchins and sand… … Useful english dictionary
holectypina — hōˌlektəˈpīnə noun plural Usage: capitalized Etymology: New Latin, from Holectypus, genus of sea urchins (from hol + Greek ektypos worked in relief) + ina : a suborder of extinct sea urchins (order Exocycloida) having a central peristome, an… … Useful english dictionary
keyhole urchin — noun : a flat sea urchin of the order Exocycloida with long narrow apertures occurring near the margin of the test … Useful english dictionary
micraster — mīˈkrastə(r) noun Usage: capitalized Etymology: New Latin, from micr + aster : a genus of extinct heart urchins (order Exocycloida) with ambulacral furrows arranged in a small star on the dorsal surface … Useful english dictionary
