substituend

Etymology
Borrowed from ; compare.

Noun

 * 1)  A substitute; something that substitutes for another.
 * 2)  A substituendum; something to be substituted or replaced.
 * 1)  A substituendum; something to be substituted or replaced.
 * 1)  A substituendum; something to be substituted or replaced.
 * 1)  A substituendum; something to be substituted or replaced.