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Reticulated-gla (q. v.). vit-ro-type, s. [Latin vitrum = gla , and Eng. type.] Photog.: A name given to the proce es which involved the production of collodion film pictures on gla . IMG:content-0553.png:[blocks in formation] IMG:content-0554.png:[blocks in formation] (2) Internal projections or inflections of the valves of Diatoms. They form imperfect septa, and appear as dark lines.