definiendum

plural definienda

1. human sciencesThe term (word or phrase) defined in a definition (whether inside a sentence, as a dictionary entry, or otherwise).

   However, most advocates of the importance of real definition have limited the definiendum to certain kinds of things: usually an abstract entity or a concept.

   1991, William Thomas Parry, Edward A. Hacker, Aristotelian Logic, SUNY Press, →ISBN, page 84

   1 more example

   The objects themselves are the definienda of the definition. The first set of properties through which the definienda are collected together to form a group is called ‘the limiting properties of being the definienda of the definition’.

   2013, Edward Craig, editor, Concise Routledge Encyclopedia of Philosophy, Routledge, →ISBN, page 198