hypostome
noun
hy·po·stome ˈhī-pə-ˌstōm 
: any of several structures associated with the mouth: such as
a
: the manubrium of a hydrozoan
b
: a rodlike organ that arises at the base of the beak in various mites and ticks
Word History
Etymology
International Scientific Vocabulary hypo- + -stome (from Greek stoma mouth) — more at stomach entry 1
First Known Use
circa 1862, in the meaning defined above
Medical Definition
hypostome
noun
hy·po·stome ˈhī-pə-ˌstōm
: a rodlike organ that arises at the base of the beak in various mites and ticks