Originally Posted by TonySinclair
I think you are referring to a disputed word in 1 Corinthians. But there are verses in the Mosaic Law which are straightforward. They not only condemn homosexual acts; they make them a capital crime.
Lev 18:22 --- "You shall not lie with a male as one lies with a female; it is an abomination."
Lev 20:13 --- "If there is a man who lies with a male as those who lie with a woman, both of them have committed a detestable act; they shall surely be put to death. Their bloodguiltiness is upon them."
Both verses from the New American Standard translation.
Yes, but without it being reaffirmed in the Old Testament, this could be ignored as being replaced by Jesus' message to love one another. An overly simple way to describe it is that Christians only use verses in the Old Testament that are reaffirmed in the New.
Unfortunately, Romans 1:26-27 is a bit more explicit without needing to use the term:
Because of this, God gave them over to shameful lusts. Even their women exchanged natural sexual relations for unnatural ones.  In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed shameful acts with other men, and received in themselves the due penalty for their error.
Originally Posted by CurtC
Maybe you're thinking of lesbianism? As I recall, you have to do a lot of interpreting of one Bible verse to find anything against lesbians. But the prohibitions against male homosexuality are very clear.
I guess the above verses don't explicitly condemn lesbianism, as they don't specify what "unnatural relations" the women are participating in, but the words "in the same way" at the start of verse 27 does imply that they are doing the same thing the men are doing.
BTW, the way to get around these verses is to interpret Paul as talking about specific practices currently happening in the Roman world, and that the relations referred to idol worship, and not the modern form of homosexual relationship. This is similar to how the verses prohibiting women from talking in church or teaching a man are interpreted.