Term: tennis ball: ball about the size of a fist used in playing tennis
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: transaminase: a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound)
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: soda jerk: someone who works at a soda fountain
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: frigate: a medium size square-rigged warship of the 18th and 19th centuries
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: valve: one of the paired hinged shells of certain molluscs and of brachiopods
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: cardamom: rhizomatous herb of India having aromatic seeds used as seasoning
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: needle biopsy: biopsy of deep tissue that is obtained through a hollow needle
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: drollery: a comic incident or series of incidents
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: stoma: a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: blow: an impact (as from a collision)
Broader: instrumentality: an artifact (or system of artifacts) that is instrumental in accomplishing some end | Unrelated: rare earth: any element of the lanthanide series (atomic numbers 57 through 71)