noun
individual difference; variation among individuals
Used in scientific, medical, and everyday contexts to describe differences between individuals of the same species or group.
薬の効き目には個体差がある。
There are individual differences in the effectiveness of medicine.
同じ訓練をしても、結果に個体差が出る。
Even with the same training, individual differences appear in the results.
Compound of 個体 (individual) + 差 (difference).