hŏrīzon — Lewis & Short
hŏrīzon, ontis, m., = o(ri/zwn (sc. ku/klos or a)h/r).
I The horizon (pure Lat. finiens and finitor), Macr. Somn. Scip. 1, 15 fin.; id. S. 7, 14 fin.; Hyg. Astr. 1, 4.—
II A line drawn through the centre of a sundial, Vitr. 9, 8.