̷ ̷ˈ ̷ ̷bənsē, -si noun
( -es )
1. : the quality or state of being absorbent
2. or ab·sorb·ance -ən(t)s or ab·sorb·an·cy -ənsē, -si : the ability of a layer of a substance to absorb radiation expressed mathematically as the negative common logarithm of transmittance — compare absorptance