<B>periwinkle</B> (2), noun.<DL COMPACT><DD><B> 1a. </B>a sea snail with a thick, cone-shaped, spiral shell, used for food in Europe. There are several kinds, making up a genus of mollusks. <DD><B> b. </B>the shell of this snail or of certain other marine univalve mollusks. <DD><B> 2. </B>any one of certain other relatively large marine snails used for food; winkle. <DD><B> 3. </B>a kind of freshwater snail of the southern United States. </DL>
<A NAME="perjure">
<B>perjure, </B>transitive verb, <B>-jured,</B> <B>-juring.</B><DL COMPACT><DD> to make (oneself) guilty of perjury. <BR><I>expr. <B>perjure oneself,</B> </I>to swear falsely; lie under oath; swear that something is true which one knows to be false. <BR> <I>Ex. The witness perjured himself by lying about what he did on the night of the crime.</I> </DL>
<A NAME="perjured">
<B>perjured, </B>adjective.<DL COMPACT><DD><B> 1. </B>guilty of perjury. <BR> <I>Ex. a perjured witness.</I> (SYN) forsworn. <DD><B> 2. </B>characterized by or involving perjury. <BR> <I>Ex. perjured evidence.</I> </DL>
<A NAME="perjurer">
<B>perjurer, </B>noun.<DL COMPACT><DD> a person who commits or is guilty of perjury. </DL>
<B>perjury, </B>noun, pl. <B>-ries.</B><DL COMPACT><DD><B> 1. </B>the act or crime of swearing that something is true which one knows to be false, or of withholding testimony while under oath. <DD><B> 2. </B>a violation of a promise made on oath to do or not to do something. <BR> <I>Ex. If thou swear'st, Thou mayst prove false; at lovers' perjuries, They say, Jove laughs (Shakespeare).</I> </DL>
<A NAME="perk">
<B>perk</B> (1), verb, adjective.<DL COMPACT><DD><I>v.t. </I> to raise smartly or briskly. <BR> <I>Ex. The dog perked his ears when he heard his master.</I> <DD><I>v.i. </I> <B>1. </B>to move, lift the head, or act briskly or saucily. <BR> <I>Ex. ... their round, little-eyed meek faces perking sidewise (William Hone).</I> <DD><B> 2. </B>to put oneself forward briskly or assertively. <DD><B> 3. </B>(British.) to preen, as before a mirror. <BR> <I>Ex. You'd be perking at the glass the next minute (George Eliot).</I> <DD><I>adj. </I> <B>1. </B>saucy; pert; cocky. <DD><B> 2. </B>in good spirits. <DD><B> 3. </B>spruce; smart. <BR><I>expr. <B>perk out,</B> </I>to make trim or smart. <BR> <I>Ex. She is all perked out in her Sunday clothes.</I> <BR><I>expr. <B>perk up,</B> <DD><B> a. </B>liven or brighten up; become lively and vigorous. </I> <I>Ex. The sick girl perked up when she received the flowers. Demand for lead has perked up amid reports that the price might move up again (Wall Street Journal).</I> <DD><B> b. </B>to make trim or smart. <BR> <I>Ex. You are not quite a woman yourself--though you perk yourself up so daintily (J. P. Kennedy).</I> </DL>
<B>perk</B> (3), noun.<DL COMPACT><DD> (Informal.) perquisite. <BR> <I>Ex. The list of such "perks" recommended for taxation ranges from company jets, and cars for personal use to day-care centers for children of employees (New York Times).</I> </DL>
<A NAME="perky">
<B>perky, </B>adjective, <B>perkier,</B> <B>perkiest.</B><DL COMPACT><DD> smart; brisk; saucy; pert. <BR> <I>Ex. a perky squirrel. The suits include a perky one of gray flannel with a nipped-in jacket (New Yorker).</I> (SYN) jaunty. adv. <B>perkily.</B> noun <B>perkiness.</B> </DL>
<A NAME="perlite">
<B>perlite, </B>noun.<DL COMPACT><DD> a form of obsidian or other vitreous rock broken up by minute spherical cracks; pearlite. </DL>
<A NAME="perlitic">
<B>perlitic, </B>adjective.<DL COMPACT><DD> of or having to do with perlite. </DL>
<A NAME="perm">
<B>perm, </B>noun, verb.<DL COMPACT><DD> (Informal.) <DD><I>noun </I> a permanent wave. <DD><I>v.t. </I> to give a permanent wave to. </DL>
<A NAME="perm">
<B>perm.,</B><DL COMPACT><DD> permanent. </DL>
<A NAME="permafrost">
<B>permafrost, </B>noun.<DL COMPACT><DD> a layer of permanently frozen soil and other deposits, sometimes reaching a depth of a thousand feet or more, found near the surface throughout most of the arctic regions. </DL>
<A NAME="permalloy">
<B>Permalloy, </B>noun.<DL COMPACT><DD> (Trademark.) any alloy of a group consisting of iron and nickel with small amounts of various other metals, noted for high magnetic permeability. </DL>
<A NAME="permanence">
<B>permanence, </B>noun.<DL COMPACT><DD> the condition of being permanent; lasting quality or condition. <BR> <I>Ex. the permanence of the sun.</I> (SYN) durability. </DL>
<A NAME="permanency">
<B>permanency, </B>noun, pl. <B>-cies.</B><DL COMPACT><DD><B> 1. </B><B>=permanence.</B> <DD><B> 2. </B>a permanent person, thing, or position. </DL>
<A NAME="permanent">
<B>permanent, </B>adjective, noun.<DL COMPACT><DD><I>adj. </I> <B>1. </B>lasting; intended to last; not for a short time only. <BR> <I>Ex. a permanent filling in a tooth. After doing odd jobs for a week, he got a permanent position as a helper in a store.</I> (SYN) abiding, enduring. <DD><B> 2. </B>(Botany.) persistent. <DD><I>noun </I> (Informal.) a permanent wave. adv. <B>permanently.</B> noun <B>permanentness.</B> </DL>
<A NAME="permanentmagnet">
<B>permanent magnet,</B><DL COMPACT><DD> a magnet that retains its magnetism after the magnetizing current or force has been removed. <BR> <I>Ex. Permanent magnets are used in thermostats, television sets, and guided missiles (Wall Street Journal).</I> </DL>
<A NAME="permanentmagnetism">
<B>permanent magnetism,</B><DL COMPACT><DD> magnetism which continues after the magnetizing influence has been withdrawn. </DL>
<A NAME="permanentmoldcasting">
<B>permanent-mold casting,</B><DL COMPACT><DD> a cast-iron cavity used to mold aluminum castings that have a stronger and better surface finish than sand-casting. </DL>
<A NAME="permanentpress">
<B>permanent press,</B> =durable press.</DL>
<A NAME="permanenttooth">
<B>permanent tooth,</B> pl. <B>permanent teeth.</B><DL COMPACT><DD> one of the set of teeth that replace the milk teeth and become permanent in adults. Human beings have 32 permanent teeth. </DL>
<A NAME="permanentwave">
<B>permanent wave,</B><DL COMPACT><DD> a wave put in the hair by a special process so as to last several months. </DL>
<A NAME="permanentway">
<B>permanent way,</B><DL COMPACT><DD> (British.) the roadbed and track of a railroad. </DL>
<A NAME="permanganate">
<B>permanganate, </B>noun.<DL COMPACT><DD> a salt of an acid containing manganese. A solution of potassium permanganate is used as an antiseptic. </DL>
<A NAME="permanganicacid">
<B>permanganic acid,</B><DL COMPACT><DD> an acid that is unstable except in dilute solutions. Its aqueous solution is used as an oxidizing agent. </DL>
<A NAME="permeability">
<B>permeability, </B>noun.<DL COMPACT><DD><B> 1. </B>the condition of being permeable. <BR> <I>Ex. The damage may be in the form of changing the permeability of cell walls (Science News Letter).</I> <DD><B> 2. </B>(Physics.) the ratio of magnetic induction to the intensity of the magnetic field. <BR> <I>Ex. The permeability depends on the past history (magnetically speaking) of the iron (Sears and Zemansky).</I> <DD><B> 3. </B>the amount of gas diffused through the fabric of an airship in a given period of time. </DL>
<A NAME="permeable">
<B>permeable, </B>adjective.<DL COMPACT><DD> that can be permeated; allowing the passage or diffusion of liquids or gases through it. <BR> <I>Ex. permeable cell walls. A sponge is permeable by water.</I> (SYN) pervious. noun <B>permeableness.</B> adv. <B>permeably.</B> </DL>
<A NAME="permeance">
<B>permeance, </B>noun.<DL COMPACT><DD><B> 1. </B>the act or fact of permeating. <DD><B> 2. </B>(Physics.) the reciprocal of the reluctance of a magnetic circuit. </DL>
<A NAME="permease">
<B>permease, </B>noun.<DL COMPACT><DD> an enzyme that helps to effect the transport and concentration of certain sugars in cells. </DL>
<A NAME="permeate">
<B>permeate, </B>verb, <B>-ated,</B> <B>-ating.</B><DL COMPACT><DD><I>v.t. </I> <B>1. </B>to spread through the whole of; pass through. <BR> <I>Ex. The odor of smoke permeated the house. (Figurative.) The effects of technology have permeated the lives of every human being alive today.</I> (SYN) pervade. <DD><B> 2. </B>to penetrate through pores or openings; soak through. <BR> <I>Ex. Water will easily permeate a cotton dress.</I> (SYN) saturate. <DD><I>v.i. </I> to diffuse itself. </DL>
<A NAME="permeation">
<B>permeation, </B>noun.<DL COMPACT><DD> the act or fact of permeating; penetration; diffusion through; saturation. </DL>
<A NAME="permeative">
<B>permeative, </B>adjective.<DL COMPACT><DD> tending to permeate. </DL>
<A NAME="permensem">
<B>per mensem,</B><DL COMPACT><DD> (Latin.) by the month. </DL>
<A NAME="permian">
<B>Permian, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>a geological period, the last of the Paleozoic, after the Pennsylvanian and before the Triassic. It was characterized by the end of the trilobites, the spread of the reptiles, and the occurrence of ice-sheet glaciation in Australia, India, and South Africa. <DD><B> 2. </B>the rocks formed in this period. <DD><I>adj. </I> of this period or these rocks. </DL>
<A NAME="permill">
<B>per mill</B> or <B>per mil,</B><DL COMPACT><DD> by the thousand; in thousands. </DL>
<A NAME="permillage">
<B>permillage, </B>noun.<DL COMPACT><DD> rate per thousand. </DL>
<A NAME="permineralization">
<B>permineralization, </B>noun.<DL COMPACT><DD> a process of fossil petrifaction in which minerals fill in the small air spaces in the fossil bones or shells without changing the original shape of the fossil. </DL>
<A NAME="permissibility">
<B>permissibility, </B>noun.<DL COMPACT><DD> the quality of being permissible; allowableness. </DL>