What's the difference between check and lactifuge?

Check

Definition:

(n.) A word of warning denoting that the king is in danger; such a menace of a player's king by an adversary's move as would, if it were any other piece, expose it to immediate capture. A king so menaced is said to be in check, and must be made safe at the next move.
(n.) A condition of interrupted or impeded progress; arrest; stop; delay; as, to hold an enemy in check.
(n.) Whatever arrests progress, or limits action; an obstacle, guard, restraint, or rebuff.
(n.) A mark, certificate, or token, by which, errors may be prevented, or a thing or person may be identified; as, checks placed against items in an account; a check given for baggage; a return check on a railroad.
(n.) A written order directing a bank or banker to pay money as therein stated. See Bank check, below.
(n.) A woven or painted design in squares resembling the patten of a checkerboard; one of the squares of such a design; also, cloth having such a figure.
(n.) The forsaking by a hawk of its proper game to follow other birds.
(n.) Small chick or crack.
(v. t.) To make a move which puts an adversary's piece, esp. his king, in check; to put in check.
(v. t.) To put a sudden restraint upon; to stop temporarily; to hinder; to repress; to curb.
(v. t.) To verify, to guard, to make secure, by means of a mark, token, or other check; to distinguish by a check; to put a mark against (an item) after comparing with an original or a counterpart in order to secure accuracy; as, to check an account; to check baggage.
(v. t.) To chide, rebuke, or reprove.
(v. t.) To slack or ease off, as a brace which is too stiffly extended.
(v. t.) To make checks or chinks in; to cause to crack; as, the sun checks timber.
(v. i.) To make a stop; to pause; -- with at.
(v. i.) To clash or interfere.
(v. i.) To act as a curb or restraint.
(v. i.) To crack or gape open, as wood in drying; or to crack in small checks, as varnish, paint, etc.
(v. i.) To turn, when in pursuit of proper game, and fly after other birds.
(a.) Checkered; designed in checks.

Example Sentences:

(1) If the method was taken into routine use in a diagnostic laboratory, the persistence of reverse passive haemagglutination reactions would enable grouping results to be checked for quality control purposes.
(2) 119 representatives of this population were checked in their sexual contacts; of these, 13 persons proved to be infected with HIV.
(3) In 14 of the patients the imaging results were checked against the histological findings of a subsequent thymectomy, which revealed four thymomas and (with the exception of one normal thymus) hyperplastic changes in all the others.
(4) The results indicated that 48% of the sample either regularly checked their own skin or had it checked by another person (such as a spouse), and 17% had been screened by a general practitioner in the preceding 12 months.
(5) The government has blamed a clumsily worded press release for the furore, denying there would be random checks of the public.
(6) Photosynthetic activity of the cells was checked by placing the cell evenly illuminated in a (14)CO(2) atmosphere.
(7) The system of automated diagnosis makes it possible to significantly increase the quality and efficacy of wide-scale prophylactic check-ups of the population.
(8) I'll admit to not having realised that more than £100bn would be committed to Trident – I half-remembered reading that it would cost £20bn, so went online, only to discover that the higher figure checks out .
(9) After a four-week period on a placebo, hypertensive smokers were treated with slow-release nicardipine 40 mg twice daily for six months and were checked at the end of the placebo period, after the first dose of nicardipine and at the end of six months of therapy.
(10) Adverse events and life status were checked at regular intervals.
(11) His bracelets and his hair, neatly gathered in a colourful elasticated band, contrast with his unflashy day-to-day uniform of checked shirts, jeans or cheap chinos and trainers.
(12) Other details showed the wrong patient undergoing a heart procedure, and the wrong patient given an invasive colonoscopy to check their bowel.
(13) Also remember that each time you apply for a loan your credit record is checked, which will leave a footprint of the search.
(14) Check out the latest bill from Russia's parliament, the Duma: its aim is to ban the "unnecessary" usage of foreign words (in cases where there is a pre-existing Russian counterpart).
(15) Once outside the body they can be purified, expanded in culture, and checked via genome sequencing to ensure the editing has been successful.
(16) Indeed, the geographical nature of the division also keeps a check on the club's carbon footprint – Dartford rarely have to travel far outside the M25, with the trips to Bognor Regis and Margate about as distant as they get.
(17) No sick or dead monkeys were found in all the forests checked around Entebbe area during the epizootic.
(18) I tweet, check Facebook, chat with friends, keep in touch with colleagues, check in using Foursquare, use it to check work emails from home and organise notes using Evernote.
(19) At the centre of the Zyed and Bouna deaths is the continuing issue of police controls, stop and searches and identity checks.
(20) And all senior management will be required to drive Toyota vehicles and check where the problems lie.