Term: trackball: an electronic device consisting of a rotatable ball in a housing; used to position the cursor and move images on a computer screen
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: perodicticus: a genus of Lorisidae
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: rough-stemmed goldenrod: a variety of goldenrod
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: salpingectomy: surgical removal of one or both Fallopian tubes
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: training college: a school providing training for a special field or profession
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: wire recorder: an early type of magnetic recorder using iron wire
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: leather strip: implement consisting of a strip of leather
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: cobweb: filaments from a web that was spun by a spider
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: school: the period of instruction in a school; the time period when school is in session
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: liquid metal reactor: a nuclear reactor using liquid metal as a coolant
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: ascus: saclike structure in which ascospores are formed through sexual reproduction of ascomycetes