Term: xenon: a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
Broader: chemical element: any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter | Unrelated: sclerotium: compact usually dark-colored mass of hardened mycelium constituting a vegetative food-storage body in various true fungi; detaches when mature and can give rise to new growth
Broader: chemical element: any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter | Unrelated: paradoxical sleep: a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep