Term: methanogen: archaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methane; a source of natural gas
Broader: physical entity: an entity that has physical existence | Unrelated: nut-leaved screw tree: East Indian shrub often cultivated for its hairy leaves and orange-red flowers
Broader: physical entity: an entity that has physical existence | Unrelated: lamplighter: (when gas was used for streetlights) a person who lights and extinguishes streetlights
Broader: physical entity: an entity that has physical existence | Unrelated: liver chestnut: a solid dark brown horse
Broader: physical entity: an entity that has physical existence | Unrelated: character: a written symbol that is used to represent speech
Broader: physical entity: an entity that has physical existence | Unrelated: briefcase computer: a portable computer housed in a box that resembles a briefcase
Broader: physical entity: an entity that has physical existence | Unrelated: reservoir: lake used to store water for community use
Broader: physical entity: an entity that has physical existence | Unrelated: mussel: black marine bivalves usually steamed in wine
Broader: physical entity: an entity that has physical existence | Unrelated: telephone cord: the telephone wire that connects to the handset
Broader: physical entity: an entity that has physical existence | Unrelated: mast: a vertical spar for supporting sails
Broader: physical entity: an entity that has physical existence | Unrelated: hyperactivity: a condition characterized by excessive restlessness and movement