There are currently 2 astronomical definitions for the tag 'hiiregion'.
RDF/XML N3 Turtle JSON
H II region, HII region
emissionlineobject, emissionnebula, interstellarmatter
compacthiiregion
bokglobule, faradayeffect, hii, cometaryglobule, emissionlinegalaxy, emissionline, excitingstar, plasma, radiorecombinationline, youngstar