S / sēmĭ-rŏtundus
adjective

sēmĭ-rŏtundus

fem. sēmĭ-rŏtunda · neut. sēmĭ-rŏtundum
half-round; semicircular
half-round, semicircular (Appuleian): subterraneum, App. M. 11, p. 260, 2: suggestus, id. ib. 5, p. 160, 2.