Term: coelostat: optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror
Broader: optical device: a device for producing or controlling light | Unrelated: plasterer: a worker skilled in applying plaster
Broader: optical device: a device for producing or controlling light | Unrelated: pithecanthropus: former genus of primitive apelike men now Homo erectus
Broader: optical device: a device for producing or controlling light | Unrelated: axiom: (logic) a proposition that is not susceptible of proof or disproof; its truth is assumed to be self-evident
Broader: optical device: a device for producing or controlling light | Unrelated: frijole: Mexican bean; usually dried
Broader: optical device: a device for producing or controlling light | Unrelated: whit-tuesday: the day after Whitmonday
Broader: optical device: a device for producing or controlling light | Unrelated: marsh pink: any of several pink-flowered marsh plant of the eastern United States resembling a true centaury
Broader: optical device: a device for producing or controlling light | Unrelated: cryptobranchus: type genus of the Cryptobranchidae
Broader: optical device: a device for producing or controlling light | Unrelated: roadbook: a guidebook describing the roads of a country; contains maps and (sometimes) a gazetteer
Broader: optical device: a device for producing or controlling light | Unrelated: proud flesh: the swollen tissue around a healing wound or ulcer
Broader: optical device: a device for producing or controlling light | Unrelated: sciatica: neuralgia along the sciatic nerve