noun
puberty; period of secondary sex characteristics development
Medical term for the stage of puberty when secondary sexual characteristics appear. Used in clinical or educational contexts.
See also: 第二次性徴
第二次性徴期には、身長が急に伸びることが多い。
During puberty, height often increases rapidly.
保健体育の授業で第二次性徴期について学んだ。
We learned about puberty in health and physical education class.
Compound of 第二次 (second, secondary), 性徴 (sex characteristics), and 期 (period, stage). A modern medical term.