Term: drainage system: a system of watercourses or drains for carrying off excess water
Broader: physical entity: an entity that has physical existence | Unrelated: genipa: any tree of the genus Genipa bearing yellow flowers and edible fruit with a thick rind
Broader: physical entity: an entity that has physical existence | Unrelated: old country: the country of origin of an immigrant
Broader: physical entity: an entity that has physical existence | Unrelated: photoemission: an emission of photoelectrons (especially from a metallic surface)
Broader: physical entity: an entity that has physical existence | Unrelated: smegma: a white secretion of the sebaceous glands of the foreskin
Broader: physical entity: an entity that has physical existence | Unrelated: hydrogen fluoride: a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride; solutions in water are hydrofluoric acid
Broader: physical entity: an entity that has physical existence | Unrelated: gam: a herd of whales
Broader: physical entity: an entity that has physical existence | Unrelated: monocular vision: vision with only one eye
Broader: physical entity: an entity that has physical existence | Unrelated: auction: a variety of bridge in which tricks made in excess of the contract are scored toward game; now generally superseded by contract bridge
Broader: physical entity: an entity that has physical existence | Unrelated: tree squirrel: any typical arboreal squirrel
Broader: physical entity: an entity that has physical existence | Unrelated: rattlesnake weed: a hawkweed with a rosette of purple-veined basal leaves; Canada to northern Georgia and Kentucky