English Words: R
21,470 words · Page 304 of 430
The part of an anammox bacterium that holds the chromosome, ribosomes and anammoxosome; it is surrounded by the paryphoplasm that is analogous to the periplasm that surrounds the cytoplasm in Gram-negative bacteria
A segment of RNA that is used to probe for a complementary sequence of nucleotides in a DNA or mRNA.
An RNA that regulates expression of itself or another nucleic acid in response to a signaling event.
A naturally occurring pentose sugar, which is a component of the nucleosides and nucleotides that constitute the nucleic acid biopolymer, RNA. It is also found in riboflavin.
A small organelle found in all cells; involved in the production of proteins by translating messenger RNA.
A segment within the leading end of a messenger RNA transcript that is able to gauge the cell's need for the protein encoded by the rest of the message, then to rearrange its shape to control whether that protein is manufactured
The attachment of a ribose or ribosyl group to a molecule, especially to a polypeptide or protein
A beefsteak cut from the primal rib area of a bovine, with the rib bone attached to the steak cut. A bone-in rib steak.
A triploid cultivar of winter apple with firm flesh and a yellow skin streaked with red.
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 304. 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.