sexual characteristics
Biological term referring to primary and secondary sexual characteristics. Often used in compounds like 第二次性徴 (secondary sexual characteristics).
第二次性徴は思春期に現れる。
Secondary sexual characteristics appear during puberty.
primary sexual characteristic
secondary sex characteristic
Compound of 性 (sex, gender) and 徴 (sign, indication). The exact historical derivation is uncertain; the spelling is conventionally associated with the biological meaning.