1. 斜角：oblique aberration 斜光束像差,轴外物点像差 | oblique angle 斜角 | oblique dark ground ilumination 倾斜暗场照明
2. 倾斜角：Oblique 倾斜的 | Oblique angle 倾斜角 | Observed value 观测值
3. 倾角：objective evidence 客观证据 | oblique angle 倾角 | obliquity 倾斜度
noun
1. oblique angle
1. an angle that is not a right angle or a multiple of a right angle