RhymeZone: operatory definitions

Definitions of operatory:

adjective: (obsolete) effective; practical; operative [16th–17th c.]
adjective: Of or relating to operations.
noun: (obsolete) A laboratory. [16th–17th c.]
noun: (medicine) A room in which a dentist (or assistant) performs tasks on the patient. [from 20th c.]

(Definitions from Wiktionary)