Real Words Without Definition
This one is a judgement call.
A scientific or medical word built out of Greek and Latin roots. This is the biggest group in the list, about a third of everything.
Medicine gives us anconitis, inflammation of the elbow, and adenalgy, pain in a gland. Chemistry gives us acetylsalicylic. Anatomy, botany and zoology all do the same thing.
Once you know the roots they are completely predictable, which is why no dictionary lists them all. You can keep making new ones forever.
18,355 words · sorted A to Z · each with a line on why it is here
Matches the word itself, not the note beside it. Case does not matter.
| Word, sorted Z to A | Field and meaning |
|---|---|
| isoionone | chemistry, isomer of ionone |
| isokeraunographic | meteorology, of equal thunderstorm frequency |
| isokeraunophonic | meteorology, of equal audible-thunder frequency |
| isokurtic | statistics, of equal kurtosis |
| isolapachol | chemistry, isomer of lapachol |
| isolichenin | chemistry, isomer of lichenin |
| isolinolenic | chemistry, isomer of linolenic acid |
| isology | chemistry, relation of isologous compounds |
| isomastigate | zoology, with flagella of equal length |
| isomelamine | chemistry, isomer of melamine |
| isomyarian | zoology, of the Isomyaria |
| isonergic | physiology, of equal energy |
| isonitramine | chemistry, isomer of nitramine |
| isonitril | chemistry, isonitrile, an isocyanide |
| isonitro | chemistry, the isonitro group |
| isonitroso | chemistry, the isonitroso group |
| isoosmosis | physiology, osmosis at equal pressures |
| isopag | geography, line of equal duration of ice |
| isopedin | histology, bony layer of ganoid scales |
| isopelletierin | chemistry, pomegranate alkaloid |
| isopelletierine | chemistry, pomegranate alkaloid |
| isophanal | phenology, of isophanes, equal-date lines |
| isophasal | physics, of equal phase |
| isophoria | ophthalmology, equal eye-muscle tension |
| isophthalyl | chemistry, isophthalyl radical |
| isophylly | botany, having leaves all alike |
| isopicramic | chemistry, isopicramic acid |
| isopiestically | physics, at constant pressure |
| isopilocarpine | chemistry, isomer of pilocarpine |
| isoplere | meteorology, line of equal air density |
| isopleural | zoology, with sides alike |
| isopleuran | zoology, a member of the Isopleura |
| isopleurous | zoology, having equal sides |
| isopodiform | zoology, shaped like an isopod |
| isopodimorphous | zoology, isopod-like in form |
| isopogonous | ornithology, feather with equal vanes |
| isopolite | Gk. antiquity, one having equal citizenship |
| isopoly | chemistry, of the isopoly acids |
| isopropylacetic | chemistry, isopropylacetic acid |
| isopropylideneacetone | chemistry, mesityl oxide |
| isopsephic | of equal numerical letter-value |
| isopsephism | practice of equal letter-number values |
| isopulegone | chemistry, isomer of pulegone |
| isopyromucic | chemistry, isopyromucic acid |
| isopyrrole | chemistry, isomer of pyrrole |
| isoquinine | chemistry, isomer of quinine |
| isorcinol | chemistry, isomer of orcinol |
| isorhamnose | chemistry, sugar isomeric with rhamnose |
| isorhodeose | chemistry, isomer of rhodeose |
| isorosindone | chemistry, isomer of rosindone |
| isosaccharic | chemistry, isosaccharic acid |
| isosaccharin | chemistry, isomer of saccharin |
| isoscope | optics, instrument showing equal values |
| isoserine | chemistry, isomer of serine |
| isoster | chemistry, an isostere |
| isostrychnine | chemistry, isomer of strychnine |
| isosuccinic | chemistry, isosuccinic acid |
| isosulphide | chemistry, an isomeric sulphide |
| isosulphocyanic | chemistry, isothiocyanic acid |
| isosultam | chemistry, an isomeric sultam |
| isotely | Gk. antiquity, equality of tax obligation |
| isoteric | physics, of equal density (cf. isostere) |
| isothiocyanic | chemistry, isothiocyanic acid |
| isothiocyano | chemistry, the isothiocyano group |
| isothujone | chemistry, isomer of thujone |
| isotimal | physics, of equal value of a quantity |
| isotimic | meteorology, surface of equal value |
| isotony | physiology, state of equal tone |
| isotrehalose | chemistry, isomer of trehalose |
| isotrimorphic | crystallography, isomorphous in three forms |
| isovalerianate | chemistry, salt of isovalerianic acid |
| isovalerianic | chemistry, isovaleric acid |
| isovalerone | chemistry, ketone from isovaleric acid |
| isovanillic | chemistry, isovanillic acid |
| isovoluminal | physiology, at constant volume |
| isoxanthine | chemistry, isomer of xanthine |
| isoxazine | chemistry, isoxazine ring compound |
| isoxime | chemistry, an isomeric oxime |
| isoxylene | chemistry, isomer of xylene |
| isoyohimbine | chemistry, isomer of yohimbine |
| isozooid | zoology, zooid like its fellows |
| issite | petrology, a pyroxenite rock from the Iss |
| isuret | chemistry, isuretine, an amidoxime |
| isuroid | ichthyology, resembling Isurus, the makos |
| italite | petrology, a leucite rock |
| itamalic | chemistry, itamalic acid |
| ithagine | ornithology, of Ithaginis, the blood pheasant |
| ithomiid | entomology, butterfly of the Ithomiidae |
| ithyphyllous | botany, having straight leaves |
| itonidid | entomology, a gall midge of the Itonididae |
| iulidan | zoology, a millipede of the Iulidae |
| ixodian | zoology, a tick of the Ixodidae |
| jaborin | chemistry, alkaloid of jaborandi |
| jacameropine | ornithology, of the jacamar genus Jacamerops |
| jalapic | chemistry, jalapic acid from jalap resin |
| japaconin | chemistry, alkaloid of Japanese aconite |
| japaconitin | chemistry, japaconitine alkaloid |
| jaspagate | mineralogy, agate mixed with jasper |
| jassoid | entomology, like the leafhopper Jassus |
| jateorhizin | chemistry, alkaloid of Jateorhiza (calumba) |
The other lists filed alongside this one.
