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but everyone (dev) will/should know some basic sql terminology and how that applies to their language of choice
This ^, and combined with examples like what have been shown above, will be much more valuable than giving the exact term. Which as you can see by the disagreement between several people who work in software in the previous responses, isn't really all that black & white.
field names, column names, column headers. any of those would make sense to me as a dev
relational database terminology or sql terminology is probably what you're after
there'll be slightly different terms depending on what language it's being developed in, but everyone (dev) will/should know some basic sql terminology and how that applies to their language of choice