altar stone

mensa.

Also called altar slab.

Origin of altar stone

1275–1325; Middle English awterston

The broken base or floor of this recess is in the position of the altar-stone in some small early Irish chapels.

Archaeological Essays, Vol. 1 |James Y. Simpson
The avenue of approach opens in front of the inner ellipse and in a line with the altar-stone.

England, Picturesque and Descriptive |Joel Cook
Propped up against the vestry wall is a Jacobean altar-stone, formerly on the Communion table, one of the very few in England.

Records of Woodhall Spa and Neighbourhood |J. Conway Walter
He was determined that while he remained in Frey's house Frey would go without human blood upon his altar-stone.

Frey and His Wife |Maurice Henry Hewlett

Then Harold shook the bird from his wrist, and it fell, with its light wing, on the altar-stone of Thor.

Harold, Complete |Edward Bulwer-Lytton