accessory sex gland

https://doi.org/10.1351/goldbook.10324

Any gland, other than a gonad, associated with the genital tract, such as the bulbourethral gland and prostate.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 715 [Terms] [Paper]