Cuspens

Cuspens is a term that does not denote a widely recognized concept in contemporary English-language scholarship. In most disciplines that discuss pointed projections or singularities, the standard plural is cusps. The form cuspens may appear as a mistaken plural, a direct borrowing from another language, or as a nonce coinage in a specific work.

In mathematics, a cusp is a point on a curve where the tangent is undefined and the curvature may diverge; common examples include the cusp of the semicubical parabola y^2 = x^3. The plural used is cusps; “cuspens” should not be treated as a standard plural.

In anatomy or dentistry, a cusp is a raised point on a tooth; the plural is cusps. Again, “cuspens” is not standard and should be considered nonstandard or context-dependent.

Other uses of the term in specialized texts may reflect language-specific forms or transcription choices, but there is no widely accepted definition of “cuspens” in major reference works. When encountered, the term is typically best treated as either a misspelling or a locale-specific variant rather than a distinct, established technical term.

Because “cuspens” is not standard, readers encountering it should check the linguistic or domain context to determine whether the author meant “cusps,” a localized term in another language, or a particular coined usage within a given work.

See also: cusp, cusps, cuspate.