1Anatomy any of the accumulations of adipose tissue beneath the synovial membrane of certain joints, originally supposed to secrete synovial fluid (now historical).
2Zoology a spermatophoric gland of a cephalopod (now rare).
Origin
Late 17th century.
Definition of mucilaginous gland in US English:
mucilaginous gland
noun
1Anatomy any of the accumulations of adipose tissue beneath the synovial membrane of certain joints, originally supposed to secrete synovial fluid (now historical).
2Zoology a spermatophoric gland of a cephalopod (now rare).