Crypt
Crypt (kript) , noun
[Latin crypta vault, crypt, Greek kry`pth, from kry`ptein to hide. See Grot, Grotto.]
1.
A vault wholly or partly under ground; especially, a vault under a church, whether used for burial purposes or for a subterranean chapel or oratory.
Priesthood works out its task age after age,... treasuring in convents and crypts the few fossils of antique learning.
My knees are bowed in crypt and shrine.
2.
(Anatomy) A simple gland, glandular cavity, or tube; a follicle; as, the crypts of Lieberkuhn, the simple tubular glands of the small intestines.