English Words: R
21,470 words · Page 17 of 430
Synonym of radiograph (“an image, often a photographic negative, produced by radiation other than ordinary light; especially an X-ray photograph”).
An image, often a photographic negative, produced by radiation other than visible light; especially an X-ray photograph.
Someone who works with radiography. This term seems to be more common in British English.
Describing a form of gravimetric analysis in which the radioactivity of a product is measured instead of its mass
A microscopic spherical disturbance in a rock caused by a grain of radioactive material.
A procedure that uses the binding of a radioactively labeled substance to an antibody in order to analyze minute amounts of biological compounds.
immunoelectrophoresis using antigens or antibodies labelled with radioisotopes
The study of immunology using antigens or antibodies labelled with radioisotopes.
To immunoprecipitate using antigens or antibodies labelled with radioisotopes
immunoprecipitation using antigens or antibodies labelled with radioisotopes
Spelling & Dictionary Insight
The English alphabetical index for the letter R contains 21,470 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 430 pages, and you are currently viewing page 17. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "R" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.