Monopotency

Part of speech: noun

Definitions

1. A condition where a substance exhibits a single, effective potency in its action within a biological system
2. Denoting the ability of a single agent to produce a distinct effect without interaction from others
3. Characterizing a situation or compound that demonstrates a uniform and exclusive level of efficacy in a given context

Etymology: Standard English dictionaries do not record "monopotency," so the word appears to be a recent coinage rather than an established term with a documented history. Its parts are clear, though. The prefix "mono-" comes from Greek "monos," meaning "single" or "alone." The base, "potency," descends from Latin "potentia," "power," which comes from "potens," the present participle of "posse," "to be able." English took "potency" in the Middle Ages, and it has long meant strength or effectiveness, as in a drug's potency. Combining the two produces a sense of efficacy that is singular and uniform, which matches the meaning you have given. Whoever formed it seems to have followed the pattern of compounds like "monochrome" or "monotone," where "mono-" marks one kind of thing throughout. Because the term is not attested in major references, its exact coinage, date and usage cannot be confirmed.

Synonyms: single power, sole potency

Antonyms: multipotency