Definition

Noun: A primary sex characteristic is a physical feature directly involved in reproduction and present at birth, determined by an individual's genetic sex. These are the fundamental anatomical structures of the reproductive system.

Usage

This term is used in biological, medical, and anatomical contexts to distinguish the basic reproductive organs from secondary characteristics that develop later (like body hair or voice changes). It refers specifically to the genitals and internal reproductive organs.

Examples

• Noun:
  • The presence of testes or ovaries is a primary sex characteristic.
  • Doctors noted that the infant's primary sex characteristics were clearly developed.
  • The study focused on the development of primary sex characteristics during fetal growth.

Advanced Usage

• In scientific discourse: The term is often contrasted with "secondary sex characteristic" to create a clear biological distinction.
  • The research paper analyzed the hormonal influences on both primary sex characteristics and secondary traits.

Variants and Related Words

• Primary sexual characteristic: A less common but synonymous variant.
• Secondary sex characteristic (n): A physical trait that emerges during puberty but is not directly part of the reproductive system (e.g., breast development, facial hair).

Synonyms

• Genitalia: Refers specifically to the external reproductive organs.
• Reproductive organs: A broader term encompassing both internal and external structures.

Related Phrases

• Sexual dimorphism: The condition where the two sexes of the same species exhibit different primary and secondary sex characteristics.

Noun

1. the genetically determined sex characteristics bound up with reproduction (genitals and organs of reproduction)