等周

isoperimetric

class / rank / grade / equal to / same as / to wait for / to await / et cetera / and so on / et al. (and other authors) / after / as soon as / once

surname Zhou / Zhou Dynasty (1046-256 BC)

to make a circuit / to circle / circle / circumference / lap / cycle / complete / all / all over / thorough / to help financially

week / weekly / variant of 周[zhou1]

the isoperimetric inequality