Well, these are the results: Over 40 persons replied, all of whom pronounce it as con-cavity where the last part refers to dental decay. No one pronounces it as con*CAVE*ity. At least two noted that their dictionary only gives this as the correct pronounciation. Many noted that they've never heard it pronounced any other way.
One person asked: >How about a survey on secant? Teachers at our school say it >differently.
I'm not volunteering to run that survey. Someone else can.
Another respondent notes:
>A friend of mine (math teacher) from Louisiana >says pith-a-GOAR-us . . . ever heard that one? It could cause quite a >conTROVersy.