A shelter formed by a body of troops holding their shields or targets close together over their heads.
(synonyms)
A shelter of similar shape for miners, etc.
The fornix.
A kind of lyre; so called in allusion to the lyre of Mercury, fabled to have been made of the shell of a tortoise.
An encysted tumour.
tortoise
turtle
(syn)
tortoise, turtle
tortoise-shell
lyre, lute
covering, shed, shelter
arch, vault
(Q)
having a big forehead