noun
reflectivity; reflectiveness
Physics term for the property of a surface to reflect light or other radiation.
この素材は反射性が高いため、光をよく反射する。
This material has high reflectivity, so it reflects light well.
Physiology term for the property of being reflexive, i.e., involving an involuntary response.
膝蓋腱反射は反射性の一例である。
The patellar tendon reflex is an example of reflexivity.