Etymology and usage
Biphobia is a portmanteau word patterned on the term homophobia. It derives from the English neo-classical prefix bi- (meaning "two") from bisexual and the root -phobia (from the Greek: φόβος, phóbos, "fear") found in homophobia. Along with transphobia and homophobia, it is one of a family of terms used to describe intolerance and discrimination against LGBT people. The adjectival form biphobic describes things or qualities related to biphobia, and the less-common noun biphobe is a label for people thought to harbor biphobia.
Biphobia need not be a phobia as defined in clinical psychology (i.e., an anxiety disorder). Its meaning and use typically parallel those of xenophobia.