You searched for: “tropopauses”
tropopause (s) (noun), tropopauses (pl)
The boundary between the troposphere and the stratosphere varying in altitude from approximately 8 kilometers (5 miles) at the poles to approximately 18 kilometers (11 miles) at the equator.
This entry is located in the following unit: tropo-, trop-, -tropal, -trope(s), -tropic, -tropism, -tropia, -tropous, -tropy, trep- (page 5)