<unk>  is a term used to classify exocrine glands in the study of histology. Cells which are classified as<unk>  bud their secretions off through the plasma membrane producing membrane bound vesicles in the lumen.
Examples of an<unk>  gland include:
the lactating mammary gland.
cerumen ("wax") of the outer ear
The structures that are usually called<unk>  sweat glands" actually secrete in a merocrine fashion.
Apocrine
Carbromal
Lactotroph
Clear cell
Nootropic
Enzyte
Gonad
Neurolemma