The second element of the compound is Anglo-Norman rochet1, ‘tunic’ while the first element remains uncertain. The Lexis of Cloth and Clothing suggests Anglo Norman ridee ‘pleated’ or Middle English riven v.2 (‘vented’) as terristrum is elsewhere glossed rochet ridé ‘pleated, vented tunic’.
(
MS: s.xiii
)
Preter hec autem instita matronalis, lumbare sive lumbatorium, renale sive bentrale, non dico limata, sed aspergines, sparta et cirmata et longa cirophea et ludices teatrales et terristrum gloss: riveroketh (C)(var. (W1: s.xiii) riveroket; (W2: s.xiii) riverocet; (D: s.xiii-xiv) riverochet)i 182 and ii 82, 111, 118, 133
riverochet (s.xiii)