( n. )
Any one of the segments of an arm of a crinoid composed of two joints so closely united that the line of union is obliterated on the outer, though visible on the inner, side.
( n. )
Any one of the segments of an arm of a crinoid composed of two joints so closely united that the line of union is obliterated on the outer, though visible on the inner, side.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012