<B>physiological, </B>adjective.<DL COMPACT><DD><B> 1. </B>having to do with physiology. <BR> <I>Ex. Digestion is a physiological process.</I> <DD><B> 2. </B>having to do with the normal or healthy functioning of an organism. <BR> <I>Ex. Food and sleep are physiological needs.</I> adv. <B>physiologically.</B> </DL>
<B>physiological psychologist,</B><DL COMPACT><DD> a person skilled in physiological psychology. </DL>
<A NAME="physiologicalpsychology">
<B>physiological psychology,</B><DL COMPACT><DD> the study of the effects of physiological functions and processes on the behavior of people and animals. </DL>
<A NAME="physiologist">
<B>physiologist, </B>noun.<DL COMPACT><DD> a person who studies or is skilled in physiology. </DL>
<A NAME="physiology">
<B>physiology, </B>noun, pl. <B>-gies.</B><DL COMPACT><DD><B> 1. </B>the science dealing with the normal functions of living things or their parts. <BR> <I>Ex. animal physiology, plant physiology, the physiology of the blood.</I> <DD><B> 2. </B>a textbook or treatise on this science. <DD><B> 3. </B>all the functions and activities of a living thing or of one of its parts. </DL>
<A NAME="physiopathology">
<B>physiopathology, </B>noun.<DL COMPACT><DD> the science dealing with the physiological aspects of disease. </DL>
<A NAME="physiosorption">
<B>physiosorption, </B>noun.<DL COMPACT><DD> adsorption in which one or more layers of molecules are held weakly to a surface by physical forces. </DL>
<A NAME="physiotherapeutic">
<B>physiotherapeutic, </B>adjective.<DL COMPACT><DD> of or having to do with physiotherapy. </DL>
<B>physique, </B>noun.<DL COMPACT><DD> bodily structure, organization, or development; physical appearance; body. <BR> <I>Ex. Samson was a man of strong physique.</I> </DL>
<A NAME="physoclistous">
<B>physoclistous, </B>adjective.<DL COMPACT><DD> (of fishes) having no duct joining the air bladder with the alimentary canal, as perches. </DL>
<A NAME="physostigmin">
<B>physostigmin, </B>noun. =physostigmine.</DL>
<A NAME="physostigmine">
<B>physostigmine, </B>noun.<DL COMPACT><DD> a highly potent, crystalline alkaloid, constituting the active principle of the Calabar bean; eserine. It has various uses in medicine, such as to stimulate the parasympathetic nerves, to contract the pupil of the eye, and to treat myasthenia gravis. </DL>
<A NAME="physostomous">
<B>physostomous, </B>adjective.<DL COMPACT><DD> (of fishes) having the air bladder connected with the alimentary canal by an air duct. </DL>
<A NAME="phyt">
<B>phyt-,</B><DL COMPACT><DD> (combining form.) the form of <B>phyto-</B> before vowels, as in <I>phytin.</I> </DL>
<A NAME="phytane">
<B>phytane, </B>noun.<DL COMPACT><DD> a complex hydrocarbon, a product of the breakdown of chlorophyll, the presence of which in oilbearing rocks is thought to be evidence of the existence of living matter 3 billion years ago. </DL>
<A NAME="phyte">
<B>-phyte,</B><DL COMPACT><DD> (combining form.) a growth or plant, as in <I>epiphyte.</I> </DL>
<A NAME="phyticacid">
<B>phytic acid,</B><DL COMPACT><DD> an acid found in cereal seeds. It is a constituent of Phytin and other salts, and is used as a rust inhibitor, metal cleaner, etc. </DL>
<A NAME="phytin">
<B>Phytin, </B>noun.<DL COMPACT><DD> (Trademark.) a calcium and magnesium salt containing phosphorus, present as a reserve material in seeds, tubers, and rhizomes. Phytin is used as a dietary supplement, providing calcium, organic phosphorus, and inositol. </DL>
<A NAME="phyto">
<B>phyto-,</B><DL COMPACT><DD> (combining form.) a plant; plants. <BR> <I>Ex. Phytotoxic = toxic to plants.</I> <DL COMPACT><DD> Also, <B>phyt-</B> before vowels. </DL>
</DL>
<A NAME="phytoalexin">
<B>phytoalexin, </B>noun.<DL COMPACT><DD> any substance produced by a plant to counteract disease. </DL>
<A NAME="phytobiology">
<B>phytobiology, </B>noun.<DL COMPACT><DD> the branch of biology which deals with plants. </DL>
<A NAME="phytochemical">
<B>phytochemical, </B>adjective.<DL COMPACT><DD> of or having to do with phytochemistry. </DL>
<A NAME="phytochemistry">
<B>phytochemistry, </B>noun.<DL COMPACT><DD> the chemistry of plants. </DL>
<A NAME="phytochrome">
<B>phytochrome, </B>noun.<DL COMPACT><DD> a bluish, light-sensitive pigment in plants which absorbs red or infrared rays and acts as an enzyme in controlling growth and other photoperiodic responses. <BR> <I>Ex. Phytochrome molecules regulate such processes as germination, growth, and flowering, turning these functions on and off in response to the length of days and nights (James A. Pearre).</I> </DL>
<A NAME="phytocidal">
<B>phytocidal, </B>adjective.<DL COMPACT><DD> able to kill plants. </DL>
<A NAME="phytogenesis">
<B>phytogenesis, </B>noun.<DL COMPACT><DD> the development or evolution of plants. </DL>
<A NAME="phytogenetic">
<B>phytogenetic, </B>adjective.<DL COMPACT><DD><B> 1. </B>of or having to do with phytogenesis. <DD><B> 2. </B>of vegetable or plant origin. adv. <B>phytogenetically.</B> </DL>
<B>phytogeographical, </B>adjective.<DL COMPACT><DD> of or having to do with phytogeography. <BR> <I>Ex. Botanists have always regarded the British Isles as a phytogeographical whole (New Scientist).</I> adv. <B>phytogeographically.</B> </DL>
<A NAME="phytogeography">
<B>phytogeography, </B>noun.<DL COMPACT><DD> the science that deals with the geographical distribution of plants. <BR> <I>Ex. What bearing had the phytogeography of the past on the evolution and dispersal of major groups like the flowering plants? (London Times).</I> </DL>
<A NAME="phytography">
<B>phytography, </B>noun.<DL COMPACT><DD> the branch of botany that deals with the description, naming, and classifying of plants; descriptive botany; plant taxonomy. </DL>
<A NAME="phytohemagglutinin">
<B>phytohemagglutinin, </B>noun.<DL COMPACT><DD> any one of various protein substances extracted from plants that cause blood cells to change in shape, divide, or clump together. </DL>
<B>phytoid, </B>adjective.<DL COMPACT><DD> of or like a plant. </DL>
<A NAME="phytol">
<B>phytol, </B>noun.<DL COMPACT><DD> a colorless, oily, unsaturated alcohol, derived from chlorophyll, used in making vitamins E and K. </DL>
<A NAME="phytolaccaceous">
<B>phytolaccaceous, </B>adjective.<DL COMPACT><DD> belonging to a family of chiefly tropical dicotyledonous trees, shrubs, and herbs, typified by the pokeweed. </DL>
<A NAME="phytologic">
<B>phytologic, </B>adjective.<DL COMPACT><DD> of or having to do with phytology; botanical. </DL>
<A NAME="phytological">
<B>phytological, </B>adjective. =phytologic.</DL>
<A NAME="phytologist">
<B>phytologist, </B>noun.<DL COMPACT><DD> a person skilled in phytology; botanist. </DL>
<A NAME="phytology">
<B>phytology, </B>noun.<DL COMPACT><DD> the science of plants; botany. </DL>
<A NAME="phyton">
<B>phyton, </B>noun.<DL COMPACT><DD> the smallest part of a plant; plant unit. </DL>
<B>phytopathogenic, </B>adjective.<DL COMPACT><DD> causing plant disease, especially by parasitic destruction of the host. <BR> <I>Ex. mixed populations of nonparasitic and phytopathogenic organisms (Science News).</I> </DL>
<A NAME="phytopathologist">
<B>phytopathologist, </B>noun.<DL COMPACT><DD> a person skilled in phytopathology; mycologist. </DL>
<A NAME="phytopathology">
<B>phytopathology, </B>noun.<DL COMPACT><DD><B> 1. </B>the science that deals with the diseases of plants. <BR> <I>Ex. The control of banana leaf disease probably represents one of the greatest achievements in the history of phytopathology (C. W. Wardlaw).</I> <DD><B> 2. </B>(Medicine.) the study of diseases as caused by plant parasites and fungi; mycology. </DL>
<A NAME="phytophagous">
<B>phytophagous, </B>adjective.<DL COMPACT><DD> feeding on plants; herbivorous. <BR> <I>Ex. A wide variety of animals, including most carnivorous and phytophagous vertebrates and invertebrates, might be classed as predators (Harbaugh and Goodrich).</I> </DL>
<A NAME="phytoplankton">
<B>phytoplankton, </B>noun.<DL COMPACT><DD> the part of the plankton of any body of water which consists of plants, usually algae. <BR> <I>Ex. The phytoplankton serves as food for tiny sea animals ... which in turn are eaten by fish, birds or other sea-going animals (Science News Letter).</I> </DL>
<A NAME="phytosociology">
<B>phytosociology, </B>noun.<DL COMPACT><DD> the branch of plant ecology dealing with the interrelations among the plants of various areas. </DL>
<A NAME="phytosterol">
<B>phytosterol, </B>noun.<DL COMPACT><DD> any one of several plant alcohols, such as ergosterol, that have the properties of sterols. </DL>
<A NAME="phytotoxic">
<B>phytotoxic, </B>adjective.<DL COMPACT><DD> toxic or injurious to plants. <BR> <I>Ex. A fungicide must have no damaging effect on the plant, that is, it should not be phytotoxic (R. L. Wain).</I> </DL>
<A NAME="phytotoxicant">
<B>phytotoxicant, </B>noun.<DL COMPACT><DD> any substance toxic to plants. </DL>
<A NAME="phytotoxicity">
<B>phytotoxicity, </B>noun.<DL COMPACT><DD> a toxic or poisonous quality injurious to plants. <BR> <I>Ex. There are available a number of excellent protective fungicides which, although not entirely free from phytotoxicity, are playing an important part in controlling plant diseases (New Scientist).</I> </DL>
<A NAME="phytotron">
<B>phytotron, </B>noun.<DL COMPACT><DD> a structure or laboratory apparatus in which climatic conditions are simulated for the study of plants in a controlled environment. </DL>
<A NAME="pi">
<B>pi</B> (1), noun, pl. <B>pis.</B><DL COMPACT><DD><B> 1. </B>the ratio of the circumference of any circle to its diameter, usually written as the Greek symbol <I>pi</I> and equal to 3.14159+. <DD><B> 2. </B>the 16th letter of the Greek alphabet, equivalent to English <I>P, p.</I> </DL>
