(pathology) A medical condition that impairs normal functioning of bodily processes that remains largely undetected under examination, dissection or even under a microscope.

Alternative form of nonfunctional

plural of gain of function

(programming) An anonymous function; a function that is defined in an inline, ad-hoc manner, and often doesn't have a name (not bound to an identifier).

(number theory) A function, denoted by ρ, used to estimate the proportion of smooth numbers up to a given bound.

(mathematics) A Schur polynomial. / (mathematics) A holomorphic function in the Schur class.

(databases) A function that performs a calculation using values from several rows, but does not group them into a single row.

plural of functional beverage

A beverage with added functionality or ingredients and consumed for its supposed health benefits.

(economics) A function that describes the relationship between consumption and disposable income.