Term: cassegrainian telescope: a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
Candidate hypernym: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end → 1
Candidate hypernym: pennant: a long flag; often tapering → 0
Candidate hypernym: drag: something that slows or delays progress → 0
Candidate hypernym: cable television: television that is transmitted over cable directly to the receiver → 0
Candidate hypernym: battering ram: a ram used to break down doors of fortified buildings → 0
Candidate hypernym: saucepan: a deep pan with a handle; used for stewing or boiling → 0
Candidate hypernym: spanish grunt: a kind of grunt → 0
Candidate hypernym: judaica: historical and literary materials relating to Judaism → 0
Candidate hypernym: television equipment: electronic equipment that broadcasts or receives electromagnetic waves representing images and sound → 0
Candidate hypernym: pott's disease: TB of the spine with destruction of vertebrae resulting in curvature of the spine → 0
Candidate hypernym: pilot balloon: meteorological balloon used to observe air currents → 0