lujvo c1 is monosexual in situation c2 by standard c4. Monosexual means sexual interest in only one sex/gender, so this word does not apply to bisexuals (= relcinse). Cf. fetcinse, nakcinse, mitcinse, dutcinse.
lujvo c1 is strictly heterosexual in situation c2 by standard c4. This word does not apply to bisexuals and is the direct Lojban equivalent of English "heterosexual". Cf. pavycinse, dutcinse, pavmitcinse.