Remember 'dorsal' indicates the top side of marine animals, like the side you'd see from above. Marine biologists track dolphins by their dorsal fins.
Pro Tip 2/3
Plant Position
'Dorsal' describes the part facing away from the stem in plants, akin to a back. The dorsal petals of an orchid are often very decorative.
Pro Tip 3/3
Object Top Side
For non-living objects, 'dorsal' is sometimes used metaphorically to denote the 'back' or 'upper' side. The dorsal side of the leaf was covered in a fine layer of dust.