The Collaborative International Dictionary of English v.0.48:

Giallolino \Gial`lo*li"no\, n. [It., from giallo yellow, prob.
   fr. OHG. gelo, G. gelb; akin to E. yellow.]
   A term variously employed by early writers on art, though
   commonly designating the yellow oxide of lead, or massicot.
   --Fairholt.
   [1913 Webster]