معنی کلمه :‌ actinometer

An instrument for measuring the actinic effect of rays of light.

An instrument for measuring the direct heating power of the sun's rays.

Of or pertaining to the tarsus (either of the foot or eye). -- n. A tarsal bone or cartilage; a tarsale. Tarsal tetter (Med.), an eruptive disease of the edges of the eyelids; a kind of bleareye. Same as Tercel. [Obs.]