| graviton | (noun) a gauge boson that mediates the (extremely weak) gravitational interactions between particles | - |
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| grindstone | (noun) a revolving stone shaped like a disk; used to grind or sharpen or polish edge tools | - |
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| gritstone | (noun) a hard coarse-grained siliceous sandstone | Synonyms: grit, gritrock |
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| guncotton | (noun) a nitric acid ester; used in lacquers and explosives | Synonyms: cellulose nitrate, nitrocellulose, nitrocotton |
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| haematohiston | (noun) a colorless protein obtained by removing heme from hemoglobin; the oxygen carrying compound in red blood cells | Synonyms: globin, hematohiston |
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| hailstone | (noun) small pellet of ice that falls during a hailstorm | - |
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| halftone | (noun) an engraving used to reproduce an illustration | Synonyms: halftone engraving, photoengraving |
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| (noun) a print obtained from photoengraving | - |
| halogeton | (noun) a coarse annual herb introduced into North America from Siberia; dangerous to sheep and cattle on western rangelands because of its high oxalate content | Synonyms: Halogeton glomeratus |
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| headstone | (noun) the central building block at the top of an arch or vault | Synonyms: key, keystone |
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| (noun) a stone that is used to mark a grave | Synonyms: gravestone, tombstone |
| hearthstone | (noun) a stone that forms a hearth | - |
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| hematohiston | (noun) a colorless protein obtained by removing heme from hemoglobin; the oxygen carrying compound in red blood cells | Synonyms: globin, haematohiston |
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| histone | (noun) a simple protein containing mainly basic amino acids; present in cell nuclei in association with nucleic acids | - |
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| holystone | (noun) a soft sandstone used for scrubbing the decks of a ship | - |
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| honkytonk | (noun) a cheap disreputable nightclub or dance hall | Synonyms: dive |
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| hornstone | (noun) a fine-grained metamorphic rock formed by the action of heat on clay rocks | Synonyms: hornfels |
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| hyperbaton | (noun) reversal of normal word order (as in `cheese I love') | - |
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| hypertonia | (noun) (of muscular tissue) the state of being hypertonic | Synonyms: hypertonicity, hypertonus |
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| hypertonicity | (noun) (of muscular tissue) the state of being hypertonic | Synonyms: hypertonia, hypertonus |
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| (noun) (of a solution) the extent to which a solution has a higher osmotic pressure than some other | - |
| hypertonus | (noun) (of muscular tissue) the state of being hypertonic | Synonyms: hypertonia, hypertonicity |
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| hypotonia | (noun) (of muscular tissue) the state of being hypotonic | Synonyms: hypotonicity, hypotonus |
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| hypotonicity | (noun) (of muscular tissue) the state of being hypotonic | Synonyms: hypotonia, hypotonus |
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| (noun) (of a solution) the extent to which a solution has a lower osmotic pressure than some other | - |
| hypotonus | (noun) (of muscular tissue) the state of being hypotonic | Synonyms: hypotonia, hypotonicity |
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| intonation | (noun) the act of singing in a monotonous tone | Synonyms: chanting |
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| (noun) singing by a soloist of the opening piece of plainsong | - |
| (noun) the production of musical tones (by voice or instrument); especially the exactitude of the pitch relations | - |
| (noun) rise and fall of the voice pitch | Synonyms: modulation, pitch contour |
| jackstones | (noun) a game in which jackstones are thrown and picked up in various groups between bounces of a small rubber ball | Synonyms: jacks, knucklebones |
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| (noun) game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks | Synonyms: jack |
| jadestone | (noun) a semiprecious gemstone that takes a high polish; is usually green but sometimes whitish; consists of jadeite or nephrite | Synonyms: jade |
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| keratonosis | (noun) any abnormal condition of the outer skin (epidermis) | - |
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| keratonosus | (noun) any disease of the cornea | - |
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| kerbstone | (noun) a paving stone forming part of a curb | Synonyms: curbstone |
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| ketone | (noun) any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals | - |
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| ketonemia | (noun) an abnormal increase of ketone bodies in the blood as in diabetes mellitus | Synonyms: acetonemia, ketosis |
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| ketonuria | (noun) excessive amounts of ketone bodies in the urine as in diabetes mellitus or starvation | Synonyms: acetonuria, ketoaciduria |
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| keystone | (noun) the central building block at the top of an arch or vault | Synonyms: headstone, key |
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| (noun) a central cohesive source of support and stability | Synonyms: anchor, backbone, linchpin, lynchpin, mainstay |
| kiloton | (noun) one thousand tons | - |
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| (noun) a measure of explosive power (of an atomic weapon) equal to that of 1000 tons of TNT | - |
| krypton | (noun) a colorless element that is one of the six inert gasses; occurs in trace amounts in air | Synonyms: atomic number 36, Kr |
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| lactone | (noun) a cyclic intramolecular ester derived from a hydroxy acid. | - |
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| lepton | (noun) an elementary particle that participates in weak interactions; has a baryon number of 0 | - |
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| (noun) 100 lepta equal 1 drachma in Greece | - |
| limestone | (noun) a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals | - |
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| loadstone | (noun) a permanent magnet consisting of magnetite that possess polarity and has the power to attract as well as to be attracted magnetically | Synonyms: lodestone |
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| lodestone | (noun) a permanent magnet consisting of magnetite that possess polarity and has the power to attract as well as to be attracted magnetically | Synonyms: loadstone |
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| magneton | (noun) a unit of magnetic moment of a molecular or atomic or subatomic particle | - |
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| marlstone | (noun) metamorphic rock with approximately the same composition as marl | Synonyms: marlite |
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| mearstone | (noun) an old term for a landmark that consisted of a pile of stones surmounted by an upright slab | Synonyms: meerestone, merestone |
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| meerestone | (noun) an old term for a landmark that consisted of a pile of stones surmounted by an upright slab | Synonyms: mearstone, merestone |
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| megaton | (noun) one million tons | - |
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| (noun) a measure of explosive power (of an atomic weapon) equal to that of one million tons of TNT | - |
| melatonin | (noun) hormone secreted by the pineal gland | - |
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| merestone | (noun) an old term for a landmark that consisted of a pile of stones surmounted by an upright slab | Synonyms: mearstone, meerestone |
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| metonym | (noun) a word that denotes one thing but refers to a related thing | - |
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| metonymy | (noun) substituting the name of an attribute or feature for the name of the thing itself (as in `they counted heads') | - |
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| mifepristone | (noun) an abortion-inducing drug (trade name RU 486) developed in France; when taken during the first five weeks of pregnancy it blocks the action of progesterone so that the uterus sloughs off the embryo | Synonyms: abortion pill, RU 486 |
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| milestone | (noun) stone post at side of a road to show distances | Synonyms: milepost |
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| (noun) a significant event in your life (or in a project) | - |
| millstone | (noun) one of a pair of heavy flat disk-shaped stones that are rotated against one another to grind the grain | - |
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| (noun) any load that is difficult to carry | - |
| (noun) (figurative) something that hinders or handicaps | Synonyms: albatross |
| monotone | (noun) an unchanging intonation | Synonyms: drone, droning |
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| (noun) a single tone repeated with different words or different rhythms (especially in rendering liturgical texts) | - |
| monotony | (noun) the quality of wearisome constancy, routine, and lack of variety | Synonyms: humdrum, sameness |
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| (noun) constancy of tone or pitch or inflection | - |
| moonstone | (noun) a transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar | - |
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| motoneuron | (noun) a neuron conducting impulses outwards from the brain or spinal cord | Synonyms: efferent neuron, motor nerve fiber, motor neuron |
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| mouton | (noun) meat from a mature domestic sheep | Synonyms: mutton |
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| muton | (noun) the smallest unit of DNA where a mutation can occur | - |
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| mutton | (noun) meat from a mature domestic sheep | Synonyms: mouton |
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| muttonfish | (noun) similar to and often marketed as `red snapper' | Synonyms: Lutjanus analis, mutton snapper |
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| muttonhead | (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: blockhead, bonehead, dumbass, dunce, dunderhead, fuckhead, hammerhead, knucklehead, loggerhead, lunkhead, numskull, shithead |
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| myotonia | (noun) abnormally long muscular contractions; slow relaxation of a muscle after a contraction | - |
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| nabumetone | (noun) a nonsteroidal anti-inflammatory drug (trade name Relafen) | Synonyms: Relafen |
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| nanoplankton | (noun) microscopic organisms found in plankton | - |
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| nekton | (noun) the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales | - |
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| neotony | (noun) the state resulting when juvenile characteristics are retained by the adults of a species | - |
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| newton | (noun) a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes | Synonyms: N |
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| nitrocotton | (noun) a nitric acid ester; used in lacquers and explosives | Synonyms: cellulose nitrate, guncotton, nitrocellulose |
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| octonary | (noun) the cardinal number that is the sum of seven and one | Synonyms: 8, eight, eighter, eighter from Decatur, octad, octet, ogdoad, VIII |
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| oilstone | (noun) a whetstone for use with oil | - |
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| opisthotonos | (noun) severe spasm in which the back arches and the head bends back and heels flex toward the back | - |
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| overtone | (noun) a harmonic with a frequency that is a multiple of the fundamental frequency | Synonyms: partial, partial tone |
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| (noun) (usually plural) an ulterior implicit meaning or quality | - |
| oxtongue | (noun) widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States | Synonyms: bitterweed, bristly oxtongue, bugloss, Picris echioides |
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| oxytone | (noun) word having stress or an acute accent on the last syllable | - |
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| paroxytone | (noun) word having stress or acute accent on the next to last syllable | - |
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| pentatone | (noun) a gapped scale with five notes; usually the fourth and seventh notes of the diatonic scale are omitted | Synonyms: pentatonic scale |
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| peptone | (noun) any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids | - |
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| peritoneum | (noun) a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera | - |
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| peritonitis | (noun) inflammation of the peritoneum | Synonyms: peritoneal inflammation |
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| phaeton | (noun) large open car seating four with folding top | Synonyms: tourer, touring car |
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| phenobarbitone | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbital, purple heart, sodium thiopental |
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| phenylketonuria | (noun) a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency | Synonyms: PKU |
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| phlogiston | (noun) a hypothetical substance once believed to be present in all combustible materials and to be released during burning | - |
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| photon | (noun) a quantum of electromagnetic radiation; an elementary particle that is its own antiparticle | - |
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| phytonadione | (noun) a form of vitamin K, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent | Synonyms: phylloquinone, vitamin K1 |
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| phytoplankton | (noun) photosynthetic or plant constituent of plankton; mainly unicellular algae | - |
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| piston | (noun) mechanical device that has a plunging or thrusting motion | Synonyms: plunger |
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| pistonphone | (noun) an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. | - |
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| pitchstone | (noun) dark acid granitic glass | - |
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| piton | (noun) a metal spike with a hole for a rope; mountaineers drive it into ice or rock to use as a hold | - |
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| plankton | (noun) the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water | - |
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| pluton | (noun) large mass of intrusive igneous rock believed to have solidified deep within the earth | Synonyms: batholite, batholith, plutonic rock |
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| plutonium | (noun) a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239 | Synonyms: atomic number 94, Pu |
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| polyptoton | (noun) repetition of a word in a different case or inflection in the same sentence | - |
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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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| polytonalism | (noun) music that uses two or more different keys at the same time | Synonyms: polytonality |
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| polytonality | (noun) music that uses two or more different keys at the same time | Synonyms: polytonalism |
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| potamoplankton | (noun) plankton that inhabit rivers | - |
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| proparoxytone | (noun) word having stress or acute accent on the antepenult | - |
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| proton | (noun) a stable particle with positive charge equal to the negative charge of an electron | - |
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| psilophyton | (noun) any plant or fossil of the genus Psilophyton | - |
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