(slang) An intergluteal cleft visible due to low-riding pants, especially when one is bending over.

(rare) Without a plumber.

Capable (as depths) of being plumbed.

(mineralogy) An isometric-hexoctahedral mineral containing calcium, fluorine, hydrogen, lanthanum, cerium, praseodymium, neodymium, samarium, lead, niobium, oxygen, sodium, titanium, tungsten, and uranium.

(mineralogy) A trigonal-hexagonal scalenohedral mineral containing hydrogen, iron, lead, oxygen, and sulfur.

(mineralogy) A trigonal-hexagonal scalenohedral mineral containing aluminum, hydrogen, lead, oxygen, and phosphorus.

(mineralogy) An isometric-hexoctahedral mineral containing calcium, hydrogen, lead, oxygen, tantalum, and uranium.

(mineralogy) A hexagonal-dihexagonal dipyramidal black mineral containing iron, lead, magnesium, manganese, and oxygen.

Without plumbing.

Synonym of plumber's helper