sēmēnstris or sēmēstris e, adj.
sex+mensis, half-yearly, semi-annual, lasting six months : regnum: imperium, Cs.: censura, L.: dux, L.: infans, six months old , L.: Semenstri vatum digitos circumligat auro, i. e. the ring of a military tribune, with a six months' commission , Iu.