What definition of "sex" is being relied upon here? I looked it up to see if there was some novel definition that means something other than male/female, and th

What definition of "sex" is being relied upon here? I looked it up to see if there was some novel definition that means something other than male/female, and there is not: https://www.merriam-webster.com/dictionary/sex https://www.merriam-webster.com/dictionary/sex I'm sure the fungus and the pioneering slime mold that had 23k sexes have high numbers of something related to reproduction, but it seems silly to construe them as sexes