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Webster 1913 Edition

Noun.

(Zool.)

A remarkable vitreous sponge, of the genus

Hyalonema

, first brought from Japan. It has a long stem, consisting of a bundle of long and large, glassy, siliceous fibers, twisted together.

glass-rope ‎(countable and uncountable, plural glass-ropes)

A vitreous sponge of the order Hexactinellida, with a long stem, consisting of a bundle of long glassy siliceous fibres twisted together.