Close Up said McDonald once alleged an isobar in a weather show was a subliminal ad for movie Shrek.
From the nzherald.co.nz
Maxwell's rule eliminates the oscillating behavior of the isotherm in the phase transition zone by defining it as a certain isobar in that zone.
From the en.wikipedia.org
One measure of the size of a tropical cyclone is determined by measuring the distance from its center of circulation to its outermost closed isobar, also known as its ROCI.