1. mathematical expressions consisting of two terms connected by a plus or minus sign
Usage: mathematics
2. scientific names consisting of two parts, typically a genus and species name
Usage: biology; taxonomy

Examples

• Students learned to factor binomials like x + 5 and 2y – 3.
• The binomial x² + 4x can be simplified by factoring.
• In algebra class, we practiced multiplying binomials using the FOIL method.
• The scientific names of species are binomials, such as Homo sapiens for humans.
• Botanists use binomials to classify plants, like Rosa rubiginosa for sweet briar.
• Each organism has a unique binomial that identifies its genus and species.
• The binomial theorem helps expand expressions like (a + b)ⁿ.