Source : Webster's Revised Unabridged Dictionary (1913)

Sericterium \Ser`ic*te"ri*um\, n. [See {Sericeous}.] (Zo["o]l.)
   A silk gland, as in the silkworms.

Source : WordNet®

sericterium
     n : silk-producing gland of insects (especially of a silkworm)
         or spiders [syn: {silk gland}, {serictery}]