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 japanese flowering cherry — any of various ornamental hybrid cherry trees developed in Japan, having white or pink blossoms and inedible fruit. 
 
 metal-free phthalocyanine — phthalocyanine (def 1). 
 
 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 
 
 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. 
 
 preferred ordinary shares — shares issued by a company that rank between preference shares and ordinary shares in the payment of dividends 
 
 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 
 
 ram's-head lady's-slipper — a rare, slender-stemmed orchid, Cypripedium arietinum, of northeastern North America, that has crimson-streaked, whitish-lipped flowers with purple sepals and grows in moist soil. 
 
 sympathetic introspection — a study of human conduct in which the investigator imagines himself or herself engaged in that conduct. 
 
 the politically incorrect — politically incorrect people considered collectively 
 
 the trash heap of history — a figurative or imaginative place where forgotten things or people go 
 
 thermodynamic temperature — temperature defined in terms of the laws of thermodynamics and not in terms of the properties of any real material. It is usually expressed on the Kelvin scale 
 
 thin-layer chromatography — chromatography in which glass plates coated with thin layers of alumina, silica gel, or cellulose are used as an adsorbent. 
 
 transcendental-philosophy — transcendental character, thought, or language.