Definition that contains upper surface
- ceiling the overhead upper surface of a covered space
- palate the upper surface of the mouth that separates the oral and nasal cavities
- dorsal belonging to or on or near the back or upper surface of an animal or organ or part
- spoiler a hinged airfoil on the upper surface of an aircraft wing that is raised to reduce lift and increase drag
- meniscus (physics) the curved upper surface of a nonturbulent liquid in a vertical tube
- pternohyla fodiens terrestrial burrowing nocturnal frog of grassy terrain and scrub forests having very hard upper surface of head; of the United States southwest
- lowland burrowing treefrog terrestrial burrowing nocturnal frog of grassy terrain and scrub forests having very hard upper surface of head; of the United States southwest
- sarcoscypha coccinea a discomycete that is a harbinger of spring; the fruiting body is thin and tough and saucer-shaped (about the size of quarter to a half dollar) with a deep bright red upper surface and a whitish exterior
- flat-topped having a flat or flattened upper surface
- universal veil membrane initially completely investing the young sporophore of various mushrooms that is ruptured by growth; represented in the mature mushroom by a volva around lower part of stem and scales on upper surface of the cap