Greengage

Chambers's Encyclopaedia, Volume 5: Friday to Humanitarians, p. 405

Greengage, a variety of plum, of a green or yellow colour and roundish shape, the Reine Claude of the French, generally esteemed as one of the finest varieties in cultivation, if not certainly superior to all others. It is not of the largest size, but in delicacy and richness of flavour it is unsurpassed. Some reckon it a variety of Prunus insititia, others as a distinct species, P. italica.

Source scan(s): p. 0420