The Collaborative International Dictionary of English v.0.48:
Sericterium \Ser`ic*te"ri*um\, n. [See Sericeous.] (Zool.) A silk gland, as in the silkworms. [1913 Webster]WordNet (r) 3.0 (2006):
sericterium n 1: silk-producing gland of insects (especially of a silkworm) or spiders [syn: silk gland, serictery, sericterium]