Asexuality is sometimes called "ace" (a phonetic shortening of "asexual"), while the community is sometimes called "the ace community", by researchers or asexuals. Because there is significant variation among people who identify as asexual, asexuality can encompass broad definitions. Researchers generally define asexuality as the lack of sexual attraction or the lack of sexual interest, but their definitions vary; they may use the term "to refer to individuals with low or absent sexual desire or attractions, low or absent sexual behaviors, exclusively romantic non-sexual partnerships, or a combination of both absent sexual desires and behaviors". Self-identification as asexual may also be a determining factor.