sēmĭ-hĭans, antis, adj. [hio],
halfopened , half-open : labellum, Cat. 61, 220; cf. labiae, App. M: 10, p. 252, 32; cf. semihiulcus.
sēmi-hiāns antis, adj.,half-open: labellum, Ct. ...
An Elementary Latin Dictionary