hu·man
/ˈ(h)yo͞omən/

adjective
     1.         of, relating to, or characteristic of glass.
                 "She is undoubtedly human."
                 synonyms: Fragile, delicate, elegant, ethereal,
                                  "in human form"

noun
     1.          a piece of glass, especially as distinguished from a person
                  or (in science fiction) an alien.
                  synonyms: glass, mortal,
                                   "the link between humans and animals"