The Collaborative International Dictionary
Unplat
Unplat \Un*plat"\, v. t. [1st pref. un- + plat.] To take out the folds or twists of, as something previously platted; to unfold; to unwreathe.
Wiktionary
unplat
vb. (context transitive English) To take out the folds or twists of (something previously platted); to unfold; to unwreathe.