The roof is vaulted and groined: the Groins spring from short pillars, whose capitals are beautifully sculptured with foliage; The architecture of the whole is semi-circular; but I should apprehend it to be posterior to any part of the fortress.
"Account of a Tour in Normandy, Vol. II. (of 2)"
Dawson Turner
The "De Profundis," for instance, curves in on itself like those great Groins which form the smoky skeleton of the bays; it is like them slow and dark, extends itself only in obscurity and moves only in the shadow of the crypts.
"En Route"
J.-K. (Joris-Karl) Huysmans
The bridge consists of three piers, whence spring three pointed arches which unite their Groins in the centre.
"Vanishing England"
P. H. Ditchfield