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adj.
of an instrument or device; capable of registering minute differences or changes precisely; "almost undetectable with even the most delicate instruments"
adj.
difficult to handle; requiring great tact; "delicate negotiations with the big powers";"hesitates to be explicit on so ticklish a matter"; "a touchy subject"
adj.
capable of or liable to: "open to interpretation"; "an issue open to question"; "the time is fixed by the director and players and therefore subject to much variation"; "susceptible of proof"