D defs.my
Entry 2 senses Webster, 1913

Adopter

/əd-äp'-tẽr/ · A·dopt·er · IPA /əˈdɑp.tɚ/
01 n. One who adopts.
  1. 1.
    One who adopts.
  2. 2.
    A receiver, with two necks, opposite to each other, one of which admits the neck of a retort, and the other is joined to another receiver. It is used in distillations, to give more space to elastic vapors, to increase the length of the neck of a retort, or to unite two vessels whose openings have different diameters.(Chem.)