Definition and pronunciation
Secondary sex characteristics (noun phrase) — physical traits that appear during puberty and distinguish the sexes, but are not directly involved in reproduction. These changes are driven by sex hormones such as testosterone and estrogen and include features like breast development, voice deepening, body hair growth, and changes in body shape.
Pronunciation: /ˈsɛkəndɛri sɛks ˌkærɪktəˈrɪstɪks/ (“SEK-uhn-der-ee seks KAR-ik-tuh-RIS-tiks”)
Easy explanation
Secondary sex characteristics are the body changes that happen during puberty — things that show whether someone is male or female but don’t make babies directly. For example, boys grow deeper voices and facial hair; girls grow breasts and wider hips.
Grammatical formation
- Part of speech: plural noun phrase.
- Singular (rare): secondary sex characteristic.
- Common verbs: develop secondary sex characteristics, show secondary sex characteristics, stimulate secondary sex characteristics.
- Adjectival use: secondary-sex-characteristic development.
Word comparisons
- Primary vs. secondary sex characteristics:
- Primary are the reproductive organs (penis, testes, ovaries, uterus).
- Secondary are visible signs of sexual maturity (beard, breasts, body shape).
- Secondary sex characteristics vs. sexual dimorphism: The latter is the broader term for physical differences between sexes in any species.
- Secondary sex characteristics vs. gender expression: Gender expression is social and behavioral; secondary sex traits are biological.
Connotations
Scientific, developmental, and gender-related. The term is used in medicine, biology, and sexology to describe natural processes of sexual maturation. It also appears in gender-affirming care when discussing hormone therapy and body changes.
Prepositional usage
- development of secondary sex characteristics — puberty-related change.
- absence of secondary sex characteristics — hormonal disorder or delay.
- induction of secondary sex characteristics — through hormone therapy.
- study of secondary sex characteristics — biological or sociological research.
- difference in secondary sex characteristics — comparison between sexes.
Real-life examples
“The appearance of secondary sex characteristics marks the onset of puberty.”
“Estrogen promotes breast growth as a secondary sex characteristic.”
“Testosterone stimulates the development of facial hair and muscle mass.”
“Hormone therapy can help transgender individuals develop secondary sex characteristics that match their gender identity.”
Synonyms
pubertal traits, sexual maturity traits, bodily sexual features, hormonal traits, secondary sexual features
Antonyms
primary sex characteristics, prepubescent body, undeveloped traits, hormonal deficiency
Related terms
puberty, hormones, testosterone, estrogen, gender identity, sexual maturity, reproductive system, sexual dimorphism, puberty onset, hormonal development
Common collocations
develop secondary sex characteristics; absence of secondary sex characteristics; delayed secondary sex characteristics; induction of secondary sex characteristics; secondary sex characteristic development; male secondary sex characteristics; female secondary sex characteristics; secondary sex characteristics in puberty; hormonal control of secondary sex characteristics
Idiomatic/figurative usage
Rare in idiomatic speech. Figuratively, it sometimes appears in gender or sociological discussions, e.g., “Society often confuses secondary sex characteristics with gender itself.”
Sample sentences
“Secondary sex characteristics begin to appear around ages 10 to 14.”
“In males, a deep voice and facial hair are classic secondary sex characteristics.”
“In females, hips widen and breasts develop under the influence of estrogen.”
“Lack of secondary sex characteristics may signal delayed puberty or endocrine issues.”
Connection to sexuality
Yes—closely related, but indirectly.
Secondary sex characteristics enhance sexual attraction and identity but do not cause reproduction themselves. They influence how people perceive sexual maturity and gender differences.
- In males: deepened voice, facial and chest hair, broader shoulders, muscle mass.
- In females: breast growth, rounder hips, higher body-fat distribution, and softer skin.
These features also play roles in sexual signaling and body confidence. In sexological and psychological contexts, the development or absence of these traits can affect sexual self-image and identity formation during adolescence.
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