Source : Webster's Revised Unabridged Dictionary (1913)

Dropmeal \Drop"meal`\, Dropmele \Drop"mele`\, adv. [AS.
   drop-m?lum; dropa drop + m?l portion. Cf. {Piecemeal}.]
   By drops or small portions. [Obs.]

         Distilling dropmeal, a little at once.   --Holland.