Help, please, before we all are "does"ed to death....

http://www.merriam-webster.com/dictionary/dose

Main Entry: 1dose
Function: noun
Etymology: Middle English, from Middle French, from Late Latin dosis, from Greek, literally, act of giving, from didonai to give — more at date
Date: 15th century
1 a: the measured quantity of a therapeutic agent to be taken at one time b: the quantity of radiation administered or absorbed
2: a portion of a substance added during a process
3: an amount of something likened to a prescribed or measured quantity of medicine