upper ridge (upper-level ridge)

upper trough (upper-level trough)

upper-air chart (upper-level charty)

water diversion from the upper Yangtze River in the south to the upper Yellow River in the north

1221 upper working face

2×2 Upper Triangular Operator Matrixes

3-D upper-limb forces

95% Upper confidence limit

a landslide dam located in the upper-reach of Yell

Aberdeen Upper Reservoir

accepted upper limit

Accommodation above the Upper Deck

accurate upper bound solution

Acquired absence of both upper limbs [any level]

Acquired absence of upper limb above wrist

actual upper bound

Acute bacterial upper respiratory tract infection

Acute lymphadenitis of upper limb

Acute massive hemorrhage of upper gastrointestinal tract