English Words: P
46,516 words · Page 327 of 931
A form of enlarged photographic portrait in which a wet-plate transparency on glass was backed with white paper, on which line work was done with crayon, pencil, and colour.
The photoinduced formation of a covalent bond between two macromolecules or between two different parts of one macromolecule.
The photoinduced hardening of a monomeric, oligomeric, or polymeric substrate, normally using ultraviolet light.
Any electric current that flows as a result of photoconductivity or the photovoltaic effect
Any of several biochemical cycles, involving photoactive proteins, that take place in the retina when exposed to light
Any intramolecular photochemical process leading to a ring system by formation of one new single bond, either by a concerted process (e.g., electrocyclization) or by multi-step processes such as the Norrish-Yang reaction.
Any intermolecular photochemical process leading to a ring systems by formation of two new single bonds
Any photoinduced reaction that leads to the removal of a carbonyl group as carbon monoxide
Any photoinduced reaction that leads to the removal of a carboxyl group as carbon dioxide
Any photoinduced reaction of a conjugated compound leading to loss of conjugation
Any reduction or degradation in a useful property of a material because of a chemical change as a result of absorption of light.
Dehydrogenation that is caused or catalyzed by irradiation with light (electromagnetic radiation).
The measurement of optical density by means of a photocell that measures the loss of light transmitted through a material
Spelling & Dictionary Insight
The English alphabetical index for the letter P contains 46,516 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 931 pages, and you are currently viewing page 327. 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 "P" 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.