mare1
/
mɛː/
n.
the female of a horse or other equine animal.
Etymology
OE mearh ‘horse’, mere ‘mare’, from a Gmc base.
mare2
/
ˈmɑːreɪ,
-ri/
n.
(pl. maria
/ˈmɑːrɪə/
)
Astronomy a large, level basalt plain on the surface of the moon, appearing dark by contrast with highland areas.
Etymology
C19: special use of L. mare ‘sea’; these areas were once thought to be seas.