In the New Testament, "fornication" comes from the Greek word porneia, which includes adultery and incest. Porneia comes from another Greek word that also includes indulging in any kind of unlawful lust, which would include homosexuality.
Sa Bagong Tipan, ang pakikiapid ay nagmula sa salitang Griyego na porneia na ang kahulugan ay pangangalunya at pakikipagtalik sa malapit na kaanak.