You know it as the cure-all for all things immoveable or getting rid of pests. But do you know what the acronym means? The WD part means water displacement and 40 comes from the number of attempts it ...

The medical abbreviation QID means four times a day. It may be written as QID, qid, or q.i.d. It is Latin for quater in die, which translates to "four times per day." You only need to take QID ...