temperature midpoint

tem·per·a·ture mid·point (T_m, t_m),

the midpoint in the change in optic properties (absorbance, rotation) of a structured polymer (for example, DNA) with increasing temperature.

Synonym(s): melting temperature

tem·per·a·ture mid·point

(tm) (tem'pĕr-ă-chŭr mid'poynt)

The midpoint in the change in optic properties (absorbance, rotation) of a structured polymer (e.g., DNA) with increasing temperature.