The Collaborative International Dictionary
Redditive
Redditive \Red"di**tive\ (r?d"d?*t?v), a. [L. redditivus.] (Gram.) Answering to an interrogative or inquiry; conveying a reply; as, redditive words.
Wiktionary
redditive
Etymology 1 a. (context grammar English) Answering to an interrogative or enquiry; conveying a reply. Etymology 2
n. (context grammar English) A word which answers an interrogative.