تلفظ بین المللی : /ˌastəɹˈaɪdiə/ تلفظ : [,aast3r'aIdi@]
English
A class of Echinodermata including the true
starfishes. The rays vary in number and always have ambulacral grooves
below. The body is star-shaped or pentagonal.
A trough or sluice having cleats, grooves, or steps across the bottom for holding quicksilver and catching particles of gold when auriferous earth is washed; also, one of the cleats, grooves, or steps in such a trough. Also cal...
