Lewis & Short

mŏnŏlĭthus, a, um, adj., = μονόλιθος, consisting of a single stone, monolith (ante- and post-class.): columnae, Laber. ap. Non. 544, 33: postes marmorei monolithi, Ampel. Lib. Mem. 8, 12; Inscr. Orell. 1593.