Noun
upper side (plural upper sides)
The uppermost side of anything
A knot on the upper side is compressed, while one on the lower side is subjected to tension. Source: Internet
As an example, a 2 kHz audio baseband signal modulated onto a 5 MHz carrier will produce a frequency of 5.002 MHz if upper side band (USB) is used or 4.998 MHz if LSB is used. Source: Internet
If there is any warp in the wood, make sure that this produces dihedral on the upper side of the boomerang, i.e., if the airfoil is uppermost and the boomerang is on a flat surface, then the wingtips are raised slightly above the surface. Source: Internet
Hippolytus, Refutation of all Heresies, i. 7; Cf. Aristotle, De Caelo, 294b13-21 Xenophanes of Colophon (c. 500 BC) thought that the Earth was flat, with its upper side touching the air, and the lower side extending without limit. Source: Internet
Some books don't give any answer, while others just stress the picture of the streamlines, saying the airfoil reduces the separations of the streamlines at the upper side (Fig. 1). Source: Internet
The chick begins by "pipping"; pecking a breathing hole with its egg tooth towards the blunt end of the egg, usually on the upper side. Source: Internet