Amasthenic

• (a.) Uniting the chemical rays of light into one focus, as a certain kind of lens; amacratic.
Found on http://thinkexist.com/dictionary/meaning/amasthenic/

Amasthenic

Am`as┬Ěthen'ic adjective [ Greek ... together + ... force.] (Photog.) Uniting the chemical rays of light into one focus, as a certain kind of lens; amacratic.
Found on http://www.encyclo.co.uk/webster/A/66

amasthenic

focusing light rays to a single point
Found on http://phrontistery.info/a.html
No exact match found