Is the external magnetic plane of an NMR pronounced as B sub zero or B initial?

[Ajeezy]

I know the external magnetic plane of a machine such as an NMR is denoted as B_0_ but is that pronounced by B sub zero or B initial?

 

[tiny-tim]

Hi Ajeezy!

I always pronounce it "B zero".

 

[Ajeezy]

Thanks tiny tim. I felt that b initial was right but I've been reading into and b zero or b sub zero seems correct. Thanks again