simple past tense and past participle of hinge on

(pharmacy) A chemical chelator that: 1) secures a metal ion (often radioactive) and 2) forms a linkage (bond) between the complex and the targeting vector (e.g. a tumour targeting protein).

plural of drawal

(science fiction) A biological organism that has been created and designed by artificial means. / A person who performs robot-like tasks, or performs tasks in place of a robot.