Term: helium: a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
Broader: physical entity: an entity that has physical existence | Unrelated: white: (board games) the lighter pieces
Broader: physical entity: an entity that has physical existence | Unrelated: ghedda wax: wax from Indian and African bees
Broader: physical entity: an entity that has physical existence | Unrelated: backseat: a secondary or inferior position or status
Broader: physical entity: an entity that has physical existence | Unrelated: white leather: a leather that has been treated with alum and/or salt
Broader: physical entity: an entity that has physical existence | Unrelated: human botfly: large tropical American fly; parasitic on humans and other mammals
Broader: physical entity: an entity that has physical existence | Unrelated: nurse practitioner: a registered nurse who has received special training and can perform many of the duties of a physician
Broader: physical entity: an entity that has physical existence | Unrelated: course: education imparted in a series of lessons or meetings
Broader: physical entity: an entity that has physical existence | Unrelated: wood swallow: Australasian and Asiatic bird related to the shrikes and resembling a swallow
Broader: physical entity: an entity that has physical existence | Unrelated: car window: a window in a car
Broader: physical entity: an entity that has physical existence | Unrelated: little-head snakeweed: similar to Gutierrezia sarothrae but with flower heads having fewer rays and disk flowers