Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
glis, glīris, m. [perh. kindred with γαλέη], a dormouse: Sciurus glis, Linn.; Glis esculentus, Blumenb.; a delicacy with the Romans, Varr. R. R. 3, 15; Plin. 8, 57, 82, § 223 sq.; Mart. 13, 59; Apic. 8, 9; Petr. 31; Amm. 28, 4: in silva mea est glis nullus, Varr. ap. Charis. p. 69 and 106 P.: glirium examina, Plaut. Fragm. ap. Non. 119, 26.