What's UV-visible/fluorescent spectra?

[szhu3]

I have been working on my presentation of a microbiology course. I have
problem with this sentense:

"They have similar UV-visible/fluorescent spectra with a peak absorption at
about 400 nm."

Could someone kindly tell me what UV-visible/fluorescent spectra is? How can
the three terms(UV, visible and fluorescent spectra) be used together to
depict the peak absorption?

Many thanx

Jessie