† ˈlactiferObs.rare—1. [a. late L. lactifer milk-bearing, f.lact(i)-, lac milk + -fer bearing.] A lactiferous vessel. 1673–4Grew Anat. Plants iii. i. ii. §16 (1682) 109 The outmost which make the other Rings [of the Bark] in Arched Parcels, are the Lactifers.