noun
(transplant) rejection; immune rejection
Medical term for the body's immune system attacking a transplanted organ or tissue.
移植手術の後、拒絶反応を抑えるために免疫抑制剤が使われる。
After transplant surgery, immunosuppressants are used to prevent rejection.
noun
strong negative reaction; backlash; rejection (figurative)
Figurative extension: a strong, often emotional, rejection or resistance to an idea, person, or change.
新しい規則に対して社員から拒絶反応が出た。
There was a strong backlash from employees against the new rule.
彼は初対面の人に拒絶反応を示すことがある。
He sometimes shows a strong negative reaction to people he meets for the first time.