Lewis & Short

emprosthŏtŏnĭa, ae, f., = ἐμπροσθοτονία, a disease in which the limbs are drawn forward and stiffen, Cael. Aur. Acut. 3, 6, 61.
The same called empro-sthŏtŏnos (= ἐμπροσθότονος) morbus, id. ib. 3, 6, 65.
Hence, emprosthŏtŏ-nĭcus, a, um, adj., = ἐμπροσθοτονικός, suffering from this disease, id. ib. § 69.