| polyamide | (noun) a polymer containing repeated amide groups | Synonyms: polymeric amide |
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| polyandrist | (noun) a woman with two or more husbands | - |
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| polyandrous | (adjective) having more than one husband at a time | - |
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| polyandry | (noun) the state of having more than one husband at a time | - |
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| polyanthus | (noun) florists' primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose | Synonyms: Primula polyantha |
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| polyarteritis | (noun) inflammation of several arteries | - |
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| polyatomic | (adjective) of or relating to a molecule made up of more than two atoms | - |
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| polybutene | (noun) a polymer of butylene; used in lubricants and synthetic rubber | Synonyms: polybutylene |
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| polybutylene | (noun) a polymer of butylene; used in lubricants and synthetic rubber | Synonyms: polybutene |
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| polychaete | (noun) chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles | Synonyms: polychaete worm, polychete, polychete worm |
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| polychete | (noun) chiefly marine annelids possessing both sexes and having paired appendages (parapodia) bearing bristles | Synonyms: polychaete, polychaete worm, polychete worm |
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| polychromatic | (adjective) (of light or other electromagnetic radiation) composed of more than one wavelength | - |
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| (adjective) having or exhibiting many colors | Synonyms: polychrome, polychromic |
| polychrome | (adjective) having or exhibiting many colors | Synonyms: polychromatic, polychromic |
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| (noun) a piece of work composed of or decorated in many colors | - |
| (verb) color with many colors; make polychrome | Synonyms: polychromise, polychromize |
| polychromic | (adjective) having or exhibiting many colors | Synonyms: polychromatic, polychrome |
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| polychromise | (verb) color with many colors; make polychrome | Synonyms: polychrome, polychromize |
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| polychromize | (verb) color with many colors; make polychrome | Synonyms: polychrome, polychromise |
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| polycrystalline | (adjective) composed of aggregates of crystals | - |
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| polycythemia | (noun) a disorder characterized by an abnormal increase in the number of red blood cells in the blood | - |
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| polydactyl | (adjective) of or relating to a person (or other vertebrate) having more than the normal number of digits | Synonyms: polydactylous |
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| polydactylous | (adjective) of or relating to a person (or other vertebrate) having more than the normal number of digits | Synonyms: polydactyl |
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| polydactyly | (noun) birth defect characterized by the presence of more than the normal number of fingers or toes | Synonyms: hyperdactyly |
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| polydipsia | (noun) excessive thirst (as in cases of diabetes or kidney dysfunction) | - |
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| polyelectrolyte | (noun) an electrolyte of high molecular weight | - |
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| polyester | (noun) any of a large class of synthetic fabrics | - |
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| (noun) any of numerous synthetic resins; they are light and strong and weather resistant | - |
| (noun) a complex ester used for making fibers or resins or plastics or as a plasticizer | - |
| polyestrous | (adjective) having more than one period of estrus per year | Synonyms: polyoestrous |
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| polyethylene | (noun) a lightweight thermoplastic; used especially in packaging and insulation | Synonyms: polythene |
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| polyfoam | (noun) a foam made by adding water to polyurethane plastics | Synonyms: polyurethane foam |
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| polygamist | (noun) someone who is married to two or more people at the same time | - |
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| polygamous | (adjective) having more than one mate at a time; used of relationships and individuals | - |
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| (adjective) having several forms of gametoecia on the same plant | Synonyms: heteroicous, polyoicous |
| polygamy | (noun) the condition or practice of having more than one spouse at a time | - |
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| polygene | (noun) a gene that by itself has little effect on the phenotype but which can act together with others to produce observable variations | - |
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| polygenic | (adjective) of or relating to an inheritable character that is controlled by several genes at once; of or related to or determined by polygenes | - |
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| polyglot | (adjective) having a command of or composed in many languages | - |
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| (noun) a person who speaks more than one language | Synonyms: linguist |
| polygon | (noun) a closed plane figure bounded by straight sides | Synonyms: polygonal shape |
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| polygonal | (adjective) having many sides or relating to a surface marked by polygons | - |
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| polygonally | (adverb) in a polygonal manner | - |
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| polygraph | (noun) a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration) | - |
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| polygynist | (noun) a man with two or more wives | - |
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| polygynous | (adjective) having more than one wife at a time | - |
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| polygyny | (noun) a form of polygamy in which a man has multiple wives | - |
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| polyhedral | (adjective) of or relating to or resembling a polyhedron | - |
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| polyhedron | (noun) a solid figure bounded by plane polygons or faces | - |
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| polyhidrosis | (noun) excessive and profuse perspiration | Synonyms: hyperhidrosis, hyperidrosis |
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| polymastigote | (noun) flagellates with several flagella | - |
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| polymath | (noun) a person of great and varied learning | - |
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| polymer | (noun) a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers | - |
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| polymerase | (noun) an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA | - |
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| polymeric | (adjective) of or relating to or consisting of a polymer | - |
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| polymerisation | (noun) a chemical process that combines several monomers to form a polymer or polymeric compound | Synonyms: polymerization |
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| polymerise | (verb) undergo polymerization | Synonyms: polymerize |
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| (verb) cause (a compound) to polymerize | Synonyms: polymerize |
| polymerization | (noun) a chemical process that combines several monomers to form a polymer or polymeric compound | Synonyms: polymerisation |
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| polymerize | (verb) undergo polymerization | Synonyms: polymerise |
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| (verb) cause (a compound) to polymerize | Synonyms: polymerise |
| polymetry | (noun) The combining of different metres simultaneously. | - |
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| polymorph | (noun) an organism that can assume more than one adult form as in the castes of ants or termites | - |
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| polymorphemic | (adjective) consisting of two or more morphemes | - |
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| polymorphic | (adjective) relating to the occurrence of more than one kind of individual (independent of sexual differences) in an interbreeding population | Synonyms: polymorphous |
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| (adjective) relating to the crystallization of a compound in two or more different forms | Synonyms: polymorphous |
| (adjective) having or occurring in several distinct forms | Synonyms: polymorphous |
| polymorphism | (noun) (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences) | - |
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| (noun) (chemistry) the existence of different kinds of crystal of the same chemical compound | Synonyms: pleomorphism |
| (noun) (genetics) the genetic variation within a population that natural selection can operate on | - |
| polymorphous | (adjective) relating to the occurrence of more than one kind of individual (independent of sexual differences) in an interbreeding population | Synonyms: polymorphic |
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| (adjective) relating to the crystallization of a compound in two or more different forms | Synonyms: polymorphic |
| (adjective) having or occurring in several distinct forms | Synonyms: polymorphic |
| polymyositis | (noun) myositis characterized by weakness of limb and neck muscles and much muscle pain and swelling; progression and severity vary among individuals | - |
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| polymyxin | (noun) any of several toxic antibiotics obtained from a particular soil bacterium | - |
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| polyneuritis | (noun) inflammation of many or all of the peripheral nerves (as in leprosy) | Synonyms: multiple neuritis |
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| polynomial | (adjective) having the character of a polynomial | Synonyms: multinomial |
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| (noun) a mathematical function that is the sum of a number of terms | Synonyms: multinomial |
| polynucleotide | (noun) (biochemistry) a linear polymer whose molecule is composed of many nucleotide units constituting a section of a nucleic acid molecule | - |
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| polynya | (noun) a stretch of open water surrounded by ice (especially in Arctic seas) | - |
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| polyoestrous | (adjective) having more than one period of estrus per year | Synonyms: polyestrous |
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| polyoicous | (adjective) having several forms of gametoecia on the same plant | Synonyms: heteroicous, polygamous |
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| polyoma | (noun) a virus that can initiate various kinds of tumors in mice | Synonyms: polyoma virus |
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| polyose | (noun) any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules | Synonyms: polysaccharide |
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| polyp | (noun) one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth | - |
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| (noun) a small vascular growth on the surface of a mucous membrane | Synonyms: polypus |
| polypectomy | (noun) surgical removal of a polyp | - |
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| polypeptide | (noun) a peptide containing 10 to more than 100 amino acids | - |
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| polypetalous | (adjective) having a corolla composed of many separated or distinct petals | - |
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| polyphase | (adjective) of an electrical system that uses or generates two or more alternating voltages of the same frequency but differing in phase angle | Synonyms: multiphase |
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| polyphone | (noun) a letter that has two or more pronunciations | Synonyms: polyphonic letter |
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| polyphonic | (adjective) having two or more independent but harmonically related melodic parts sounding together | Synonyms: contrapuntal |
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| (adjective) of or relating to or characterized by polyphony | Synonyms: polyphonous |
| (adjective) having two or more phonetic values | - |
| polyphonically | (adverb) in a polyphonic manner | - |
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| polyphonous | (adjective) of or relating to or characterized by polyphony | Synonyms: polyphonic |
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| polyphony | (noun) music arranged in parts for several voices or instruments | Synonyms: concerted music, polyphonic music |
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| polyphosphate | (noun) a salt or ester of polyphosphoric acid | - |
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| polyplacophore | (noun) primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates | Synonyms: chiton, coat-of-mail shell, sea cradle |
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| polyploid | (adjective) of a cell or organism having more than twice the haploid number of chromosomes | - |
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| (noun) (genetics) an organism or cell having more than twice the haploid number of chromosomes | - |
| polyploidy | (noun) the condition of being polyploid | - |
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| polypody | (noun) any of numerous ferns of the genus Polypodium | - |
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| polypore | (noun) woody pore fungi; any fungus of the family Polyporaceae or family Boletaceae having the spore-bearing surface within tubes or pores; the fruiting bodies are usually woody at maturity and persistent | Synonyms: pore fungus, pore mushroom |
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| polypropene | (noun) a polymer of propylene used as a thermoplastic molding material | Synonyms: polypropylene |
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| polypropenonitrile | (noun) acrylic resin used to make a strong soft crease-resistant fabric (trade name Acrilan) | Synonyms: Acrilan |
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| polypropylene | (noun) a polymer of propylene used as a thermoplastic molding material | Synonyms: polypropene |
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| polyptoton | (noun) repetition of a word in a different case or inflection in the same sentence | - |
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| polypus | (noun) a small vascular growth on the surface of a mucous membrane | Synonyms: polyp |
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| polysaccharide | (noun) any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules | Synonyms: polyose |
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| polysemant | (noun) a word having more than one meaning | Synonyms: polysemantic word, polysemous word |
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| polysemantic | (adjective) of words; having many meanings | Synonyms: polysemous |
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| polysemous | (adjective) of words; having many meanings | Synonyms: polysemantic |
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| polysemy | (noun) the ambiguity of an individual word or phrase that can be used (in different contexts) to express two or more different meanings | Synonyms: lexical ambiguity |
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| polysomy | (noun) congenital defect of having one or more extra chromosomes in somatic cells | - |
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| polystyrene | (noun) a polymer of styrene; a rigid transparent thermoplastic | - |
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| polysyllabic | (adjective) (of words) long and ponderous; having many syllables | Synonyms: sesquipedalian |
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| (adjective) having or characterized by words of more than three syllables | - |
| polysyllabically | (adverb) in a polysyllabic manner | - |
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| polysyllable | (noun) a word of more than three syllables | Synonyms: polysyllabic word |
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| polysyndeton | (noun) using several conjunctions in close succession, especially where some might be omitted (as in `he ran and jumped and laughed for joy') | - |
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