definiens noun. [dɪ'fɪnɪɛnz] Pl. definientia [dɪfɪnɪ'ɛntɪǝ]. L19.
[medieval Latin definiens pres. pple of definire: see DEFINE.]
The defining part of a definition, the word or phrase that states the meaning; the verbal or symbolic expression to which a definiendum is declared to be equivalent.

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