Word origins

• reteneA hydrocarbon, polymeric with benzene, that is extracted from pine tar and also found in certain fossil resins.
• retinaliteA translucent variety of serpentine of a honey-yellow to greenish-yellow colour, with a waxy resinous lustre.
• retinasphaltRetinite.
• retinophoraOne of a group of two to four united cells which occupy the axial part of the ocelli, or ommatidia, of the eyes of certain invertebrates, and contain the terminal nerve fibrils.
• rhabdiferousBeing a type of sponge cell with many rodlike inclusions and secreting mucopolysaccharide.
• rhabdusA simple, straight spicule.
• RhadamanthusA strict and just judge.
• rhagadeA fissure, crack, or linear scar in the skin, especially at the angles of the mouth and nose, often appearing as a result of bacterial infection or skin lesions.
• rhamphothecaA thin horny sheath of keratin on the outer surface of a bird's beak
• rhapsodomanticOf or pertaining to rhapsodomancy.
• rhathymiaA carefree and extroverted personality factor.
• rhematicThe provision of new information regarding the current theme.
• rheo-flow, current
• rheticOf or pertaining to a rheme.
• rhexisThe rupture of an organ.
• rhexistasyA period of intense erosion due to the absence of a cover of vegetation.
• rhigoleneA mixture of volatile hydrocarbons intermediate between gasolene and cymogene, formerly used as a refrigerant.
• rhinasterthe black rhinoceros
• rhino-Of the nose.
• rhinodonA whale shark of the Indian Ocean.
• rhinopomeAny member of the bat genus Rhinopoma.
• rhinotillexomaniaCompulsive nose-picking; the insertion of a finger into one's nose.
• rhipsalisAny plant of the genus Rhipsalis, epiphytic flowering plants in the cactus family, often known as mistletoe cacti.
• rhizanthA parasitic flowering plant, all of which were formerly assigned to the order Rhizantheae.
• rhizomeliaA disproportion of the length of the proximal limb, such as the shortened limbs of achondroplasia.
• rhizoristicRelating to the separation of the roots of an equation.
• rhodeoretinconvolvulin
• rhodizonic acidA colorless crystalline substance obtained from potassium carbonate and from certain quinones, which forms brilliant red, yellow, and purple salts.
• rhodo-rose-colored
• rhodomelA form of mead made with rosehips, rose petals, or rose attar.
• rhodospermAny seaweed with red spores, in the former class Rhodospermeae.
• RhodostauroticRosicrucian
• rhoeadic acidAn acid derived from the poppy Papaver rhoeas.
• rhoeadineAny of a group of benzazepine alkaloids found in the poppy.
• rhopographyThe depiction of trivial, everyday things.
• rhoptryA specialized secretory organelle in some protozoans
• rhyacoliteA glassy feldspar found at Mount Somma in Italy.
• rhykenologistA person who collects woodworking planes.
• rhyncho-Concerning the beak or snout.
• rhynchodaeumA cavity in some gastropods that contains the proboscis.
• rhyparographA painter of sordid or distasteful subjects.
• rhyparographyThe painting, or literary description, of mean or sordid things; especially still-life or genre painting.
• rhypophagyThe feeding on filth
• rhypophobiaThe fear of defecation.
• rhysimeterAn instrument, similar to a pitot tube, for measuring the velocity of a fluid current, the speed of a ship, etc.
• rhytidAny undesirable wrinkle in the skin.
• rhytideA wrinkle, typically a facial wrinkle secondary to muscular contraction patterns in the skin.
• rhytidomeThe dead layers of plant bark (undergoing or having undergone secondary growth) external to that of the last formed periderm http://i.word.com/idictionary/rhytidome.
• rhytonA container from which fluids are intended to be drunk, having one handle and usually a base in the form of a head.
• ripidoliteA translucent green chlorite mineral of micaceous structure; a hydrous silicate of alumina, magnesia, and iron.
• RomanioteA member of a Jewish population living in Greece, historically distinct from the Sephardim, who settled in Greece later.
• -rrhaphysuture
• -rrhexisrupture
• rupiaAn ulcer due to syphilis.
• rupophobiaThe fear of rubbish or dirt.
• rypophagousEating filth.
• salpingo-Fallopian tube.
• sanidineA variety of orthoclase feldspar found as tabular crystals embedded in volcanic rocks. Some forms (called moonstone) exhibit adularescence.
• saprovoreAny organism that feeds on detritus
• sarco-flesh
• sarcodeA remedy made from healthy living tissue.
• sarcodoThe gelatinous material forming the bodies of the lowest animals; protoplasm.
• sarcoliteA tetragonal-dipyramidal mineral containing aluminum, calcium, fluorine, oxygen, silicon, and sodium.
• sarcoticProducing or promoting the growth of flesh.
• sarissophorosA light cavalry unit in Ancient Greece that held a long spear for charging and was equipped with several javelins for harassing the enemy.
• sarkiccarnal, fleshly (especially sensual)
• sarmassophobiaA fear of romantic interactions such as dating and kissing.
• satyricOf or pertaining to a satyr.
• satyrionAny of various kinds of orchids.
• satyriskA little satyr.
• satyromaniaExcessive sexual desire in men.
• SatyrusA distinguished Peripatetic philosopher and historian
• saurognathoushaving the bones of the palate arranged as in saurians, the vomer consisting of two lateral halves, as in the woodpeckers
• sauroidResembling or relating to the saurians.
• -saurusForms names for real or imaginary dinosaurs.
• Scaeanwestern
• scalidA curved spine arranged in circles on Loricifera, Kinorhyncha or Priapulida.
• scaphanderA kind of diving suit.
• scapho-scaphoid
• scaphopodtusk shell
• scarabaeidAny beetle of the family Scarabaeidae (which includes stag- and dung-beetles).
• scato-excrement
• scatoliaThe act of smearing faeces.
• scatologyThe scientific study or chemical analysis of faeces.
• schediasmcursory writing on a loose sheet
• schematschema
• schematizeTo organize according to a scheme.
• schesisGeneral state or disposition of the body or mind, or of one thing with regard to other things; habitude.
• schesis onomatonThe use of a sentence constructed only of nouns and adjectives, without a verb.
• schisisseparation, cleft
• schistocyteA jagged red blood cell fragment without central pallor, consequent to passage through small vessels with microthrombi, leaky prosthetic heart valves etc.
• schizo-split, cleft
• schizocoeleA body cavity that forms by the splitting of mesodermal tissue to create a coelomic cavity.
• schizopelmousHaving the two flexor tendons of the toes entirely separate, and the flexor hallicus going to the first toe only.
• schizopeltidA peltidium.
• schizothymiaA temperament characterised by elements of schizophrenia or schizoid personality disorder, while still within the bounds of normality.
• scholarchThe head of a school of philosophy in Ancient Greece
• scholiumA note added to a text as an explanation, criticism or commentary.
• sciagraphA vertical section of a building; a sciagraphy.
• sciagraphyThe art of representing shadows as realistically as possible.