Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. ēmersus, a, um, Part., from emergo.
2. ēmersus, ūs, m. [emergo], a coming out, coming forth, an appearing, emerging (not ante-Aug.): serpentium, Plin. 22, 22, 46, § 95: fluminis, id. 9, 22, 38, § 75: stellae, id. 18, 25, 58, § 218; Col. 7, 3, 24: hostium, Vitr. 10, 22.