The Collaborative International Dictionary of English v.0.48:
Heliotype \He"li*o*type\, n. [Helio- + -type.] A picture obtained by the process of heliotypy. [1913 Webster]WordNet (r) 3.0 (2006):
heliotype n 1: duplicator consisting of a gelatin plate from which ink can be taken to make a copy [syn: hectograph, heliotype]