sea cucumber

noun

1. any echinoderm of the class Holothuroidea, having a long, leathery body with tentacles around the anterior end.

noun

1. any echinoderm of the class Holothuroidea, having an elongated body covered with a leathery skin and bearing a cluster of tentacles at the oral end. They usually creep on the sea bed or burrow in sand

1. See holothurian.