1. a biological parent, especially a father
Usage: formal or technical; often used in legal or scientific contexts
2. an originator or creator of something
Usage: literary or formal

Examples

• The child's biological genitor was listed on the birth certificate.
• In legal documents, the term genitor refers to a biological parent.
• He was the genitor of the modern movement in art.
• The genitor of the company established its core values decades ago.
• DNA testing can identify a child's genitor with high accuracy.