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 infantry fighting vehicle — a heavily armored combat vehicle, as a tank, used to carry infantry into battle and provide support. Abbreviation: IFV. 
 
 local education authority — a body that is responsible for education in a particular area 
 
 metal-free phthalocyanine — phthalocyanine (def 1). 
 
 methylrosaniline chloride — gentian violet. 
 
 miguel hidalgo y costilla — Miguel  [mee-gel] /miˈgɛl/ (Show IPA), 1753–1811, Mexican priest, patriot, and revolutionist. 
 
 neurocirculatory asthenia — cardiac neurosis. 
 
 never do things by halves — If you say that someone never does things by halves, you mean that they always do things very thoroughly. 
 
 oxidative phosphorylation — the aerobic synthesis, coupled to electron transport, of ATP from phosphate and ADP. 
 
 peripheral nervous system — the portion of the nervous system lying outside the brain and spinal cord. 
 
 petropavlovsk-kamchatskiy — seaport in E Asian Russia, on Kamchatka Peninsula: pop. 210,000 
 
 play into someone's hands — a dramatic composition or piece; drama. 
 
 polymerase chain reaction — a technique in which a known DNA sequence is synthesized at high temperatures by means of a polymerase, producing millions of copies for statistical analysis: used in DNA fingerprinting, in detecting minute quantities of cancer cells, etc. 
 
 polynomial-time algorithm — (complexity)   A known algorithm (or Turing Machine) that is guaranteed to terminate within a number of steps which is a polynomial function of the size of the problem. See also computational complexity, exponential time, nondeterministic polynomial-time (NP), NP-complete. 
 
 psychiatric social worker — (in Britain) a qualified person who works with mentally-ill people and their families, based in a psychiatric hospital, child guidance clinic, or social services department area team, and who may also be an approved social worker 
 
 selective synchronization — a sound-recording process that facilitates overdubs by feeding the recorded track to the performer straight from the recording head 
 
 thank one's (lucky) stars — to be thankful for what appears to be good luck 
 
 the ball is in your court — you are obliged to make the next move 
 
 the politically incorrect — politically incorrect people considered collectively 
 
 thermodynamic equilibrium — the condition of an isolated system in which the quantities that specify its properties, such as pressure, temperature, etc, all remain unchanged 
 
 thin-layer chromatography — chromatography in which glass plates coated with thin layers of alumina, silica gel, or cellulose are used as an adsorbent. 
 
 to keep a watchful eye on — If you keep a watchful eye on someone or something, you watch carefully to make sure there are no problems. 
 
 to lay claim to something — If you lay claim to something you do not have, you say that it belongs to you. 
 
 to lay siege to something — If police, soldiers, or journalists lay siege to a place, they surround it in order to force the people there to come out or give up control of the place. 
 
 transcendental-philosophy — transcendental character, thought, or language. 
 
 under the watchful eye of — If you do something under the watchful eye of someone who has authority over you, they watch you carefully to make sure there are no problems. 
 
 vertical redundancy check — (storage, communications)   (VRC) An error checking method performed on one 8-bit ASCII character, where the 8th bit is used as the parity bit. The resulting parity bit is constructed by XORing the word. The result is a "1" if there is an odd number of 1s, and a "0" if there is an even number of 1s in the word. This method is unreliable because if an odd number of bits are distorted, the check will not detect the error. The Longitudinal Redundancy Check is an improvement. 
 
 worth your weight in gold — If you say that someone or something is worth their weight in gold, you are emphasizing that they are so useful, helpful, or valuable that you feel you could not manage without them.