noun, verb, he·li·o·typed, he·li·o·typ·ing.
Origin of heliotype
Examples from the Web for heliotype
Historical Examples of heliotype
All these photographs have been printed by the Heliotype process, and the accuracy of the copy is thus guaranteed.
I have, therefore, had six of them (Plate I.) reproduced by the heliotype process.
All of the photographs are similar to those which appear in heliotype, diminished in size, as illustrations of this paper.