the means whereby some act is accomplished | ammunition whose flight can be observed by a trail of smoke |
a device that requires skill for proper use | (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes |
any of various devices or contrivances that can be used to produce musical tones or sounds | an instrument used to make tracings |
(law) a document that states some contractual relationship or grants some right | an investigator who is employed to find missing persons or missing goods |
the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process | |
a person used by another to gain an end | |