English Words: T
27,828 words · Page 157 of 557
Any of several isomeric tetramethyl derivatives of benzidine, but especially 3,3’,5,5’-tetramethylbenzidine that is a chromogenic substrate used in immunohistochemistry
A chemical compound with four methyl groups connected to a cyclopropane ring.
A hypothetical hydrocarbon, C₄H₈, analogous to trimethylene, and regarded as the base of well-known series or derivatives.
An organic compound derived from ethylenediamine by replacement of the four N-H groups with four N-methyl. It has a fishy odour and is used as a reagent and a ligand for metal ions.
The tetramethyl derivative of guanidine that is a strong base and is used as a catalyst
Any of very many isomers of a tetramethyl derivative of pentadecane, but especially pristane (2,6,10,14-tetramethylpentadecane).
Any of several isomeric tetramethyl derivatives of piperidine, but especially 2,2,6,6-tetramethylpiperidine that is used in organic synthesis
A rhodamine in which four hydrogens have been replaced by methyl groups. Forms such as tetramethylrhodamine dextran are often used as fluorescent tracer dyes in cell research.
The fully methylated derivative of urea ((CH₃)₂N)₂CO; it is used in organic synthesis
A cation obtained by protonation of tetramethylurea; any derivative of this cation
A symbolic arrangement of four differing elements, or the combination of four disparate elements in one unit.
A benzylisoquinoline alkaloid that is a calcium channel blocker and isolated from Stephania tetrandra - C₃₈H₄₂N₂O₆.
Any organic compound formed by removal of four methylene groups from a diterpenoid.
Any derivative of a triterpenoid formed by removal of four methylene groups.
Forming a complex with four nuclei, particularly used for ligands that link four metal atoms into a complex.
Spelling & Dictionary Insight
The English alphabetical index for the letter T contains 27,828 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 557 pages, and you are currently viewing page 157. 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 "T" 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.