Sand tube
| a tube made of sand. | |
| A tube of vitrified sand, produced by a stroke of lightning; a fulgurite | |
| (Zool.) | Any tube made of cemented sand. |
| (Zool.) | In starfishes, a tube having calcareous particles in its wall, which connects the oral water tube with the madreporic plate. |
See also: Sand, Sand, Sand, Sand