Distillation is a process used to separate components of a liquid mixture by boiling and condensing the vapor. The term 'ESSENCE' refers to the concentrated form of a substance, which can be obtained through distillation. An ESTER is an organic compound formed from the reaction between an acid and an alcohol, and it can also be produced through distillation. RESIDUE is the solid material that remains after a liquid has been evaporated or distilled. Finally, a LAB is a place where experiments are conducted, and distillation is often done in a laboratory setting.