1) Declivous 
Latin, meaning: (-is) a slope, decline 
The posterior sloping portion of the monticulus of the vermis of the cerebellum; vermal lobule caudal to the primary fissure. ... Synonym: declivis, lobulus clivi. ... Origin: L. Declivis, sloping downward, fr. Clivus, a slope ... (05 Mar 2000) ... 
(de-kli´ve) a slope or a slanting surface. In anatomy, the part of the vermis of the cerebellum just caudal to the primary fissure.
Type: Term Pronunciation: dē-klīv′ Definitions: 1. The posterior sloping portion of the monticulus of the vermis of the cerebellum; vermal lobule immediately caudal to the primary fissure; lobule VI. Synonyms: declivis, lobulus clivi
declive 1. Decline, a slope or a slanting surface. 2. Sloping downward.
Latin declivitas = slope (cf. clivus).
declivous.