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 |
|---|---|
| olacad | botany, a plant of the Olacaceae |
| olecranarthritis | medical, inflammation of the elbow joint |
| olenellidian | paleontology, of the trilobite Olenellus |
| olenidian | paleontology, of the trilobites Olenidae |
| oleocalcareous | geology, oily and calcareous |
| oleocyst | zoology, oil sac of a siphonophore |
| oleomargaric | chemistry, of oleomargaric acid |
| oleorefractometer | instrument for the refraction of oils |
| oleostearate | chemistry, salt of oleostearic acid |
| oleostearin | chemistry, solid fraction of a fatty oil |
| oleothorax | medical, oil injected into the pleural cavity |
| olfactophobia | medical, morbid fear of odours |
| olfactoreceptor | physiology, a receptor for smell |
| oligacanthous | botany, having few spines |
| oligidic | nutrition, chemically simple diet |
| oligidria | medical, deficient sweating |
| oligistical | mineralogy, of oligist iron (hematite) |
| oligocarpous | botany, bearing few fruits |
| oligocholia | medical, deficiency of bile |
| oligochromemia | medical, deficiency of haemoglobin |
| oligochronometer | instrument timing short intervals |
| oligochylia | medical, deficiency of chyle |
| oligoclasite | petrology, rock rich in oligoclase |
| oligocythemic | medical, having too few blood cells |
| oligodontous | zoology, having few teeth |
| oligogalactia | medical, scanty secretion of milk |
| oligohemia | medical, deficiency of blood |
| oligolactia | medical, scanty flow of milk |
| oligometochia | entomology, state of having few nest guests |
| oligometochic | entomology, with few inquiline guests |
| oligomyodian | ornithology, of the Oligomyodae |
| oligomyoid | ornithology, with few syrinx muscles |
| oligonephria | medical, kidney with few nephrons |
| oligonephric | zoology, having few nephridia |
| oligonephrous | zoology, having few nephridia |
| oligonite | mineralogy, a manganese carbonate |
| oligopepsia | medical, weakness of digestion |
| oligophosphaturia | medical, low phosphates in the urine |
| oligoplasmia | medical, deficiency of blood plasma |
| oligoprothesy | linguistics, use of few prefixes |
| oligoprothetic | linguistics, having few prefixes |
| oligopsychia | medical, feebleness of mind |
| oligopyrene | biology, sperm with reduced chromatin |
| oligorhizous | botany, having few roots |
| oligosepalous | botany, having few sepals |
| oligosialia | medical, deficient saliva |
| oligosideric | geology, containing little iron |
| oligosite | mineralogy, an oligo- mineral name |
| oligotokeus | zoology, bearing few young |
| oligotokous | zoology, producing few offspring |
| oligotrichia | medical, scantiness of hair |
| oliguresia | medical, scanty urination |
| oliguresis | medical, scanty secretion of urine |
| oliguretic | medical, of oliguresis |
| olivilin | chemistry, substance from olive resin |
| ollenite | petrology, an epidote-amphibole schist |
| omarthritis | medical, inflammation of the shoulder joint |
| ombrographic | meteorology, of an ombrograph |
| ombrological | meteorology, of ombrology (rain) |
| ombrometric | meteorology, of the rain gauge |
| ombrophoby | botany, intolerance of rain |
| omentocele | medical, hernia containing omentum |
| omentofixation | medical, surgical fixing of the omentum |
| omentorrhaphy | medical, suture of the omentum |
| omentosplenopexy | medical, omentum fixed to the spleen |
| omentotomy | medical, incision of the omentum |
| omentulum | anatomy, a small omentum |
| ommatophorous | zoology, bearing eyes on stalks |
| ommetaphobia | medical, morbid fear of eyes |
| omnimeter | surveying instrument for all angles |
| omniscope | instrument giving an all-round view |
| omphalogenous | anatomy, arising from the navel |
| omphaloma | medical, tumour of the navel |
| omphaloncus | medical, swelling of the navel |
| omphalorrhagia | medical, bleeding from the navel |
| omphalorrhea | medical, discharge from the navel |
| omphalorrhexis | medical, rupture of the umbilicus |
| omphalosite | medical, twin fed by umbilical vessels |
| omphalospinous | anatomy, navel to the iliac spine |
| omphalotripsy | medical, crushing of the umbilical cord |
| oncography | medical, recording of changes in volume |
| ondagram | physics, record made by an ondagraph |
| ondagraph | physics, recorder of electric waves |
| ondameter | physics, a wave meter |
| ondascope | physics, instrument showing wave form |
| oniscoidean | zoology, of the Oniscoidea (wood lice) |
| onofrite | mineralogy, a mercury selenide-sulphide |
| onomatop | linguistics, an onomatopoeic word |
| onomatoplasm | linguistics, name-forming material |
| onomatous | bearing a name, not anonymous |
| ontal | philosophy, of things in themselves |
| ontocycle | biology, the ontogenetic cycle |
| ontocyclic | biology, of the ontogenetic cycle |
| ontogenal | biology, of ontogeny |
| onychatrophia | medical, atrophy of the nails |
| onychin | chemistry, a substance got from nails |
| onychite | mineralogy, onyx-like alabaster |
| onychoid | zoology, nail- or claw-like |
| onychomalacia | medical, softening of the nails |
| onychonosus | medical, disease of the nails |
The other lists filed alongside this one.
