Bacterium
Bacilli
Biology, of course! Or "Biological oceanography"!
Blasphemously is a long word. It begins with the letter b.
Joule
One scientific word that begins with "B" is "biology," which is the study of living organisms.
Not a word, but a prefix "milli".
zoologist zinc
halogenheliumhydrogen
scarcity
Astronomy.
Big dipper is an outer space word. Black hole is another outer space word that begins with the letter b.
Boolean.
Baso