The spelling of "bisexuous" can be confusing because it is actually not a word in the English language. It is possible that the intended word was "bisexual," but even then the spelling can be tricky. In IPA phonetic transcription, "bisexual" is pronounced /baɪˈsɛkʃuəl/. The "x" in "bisexuous" may have been included as a mistake, as it is not a typical sound in English, and would not be included in the IPA transcription. It is important to double-check the spelling of unfamiliar words to ensure accuracy.
The word "bisexuous" is not commonly used or recognized in modern English. The correct term to refer to a person who is sexually attracted to both males and females is "bisexual". However, if you are referring to the term "bisexuous", it seems to be a variation or a blend of "bisexual" and "sensuous" or "seductive". The etymology of the word would then be a combination of these two terms. However, it is essential to note that "bisexual" is the accepted and standard term used to describe sexual attraction to both males and females.