English Words: P
46,516 words · Page 332 of 931
A goniometer, used in X-ray diffraction, that detects the X-rays using a photocell.
A photograph made without using a camera; normally by placing an object in contact with photosensitive paper and exposing it to light.
A picture created by projecting an image onto a photosensitive surface such as a chemically treated plate or film, CCD receptor, etc.
An instrument for determining the sensibility of the plates employed in photographic processes to luminous rays.
A device, consisting essentially of an electric arc and a camera, by which a series of photographs of the variations of the arc due to sound waves are obtained for reproduction by means of a selenium cell and a telephone.
The art and technology of producing images on photosensitive surfaces, and its digital counterpart.
Describing the effects of light radiation on the gravitational attraction to a star
An intaglio process for printing photographic reproductions in newspapers and books.
Heliography (photography of the sun), especially as undertaken using a photoheliograph.
A double-lens instrument for measuring slight variations of the Sun's diameter by photography, based on the common chord of two overlapping images.
A heterotrophic organism that uses light for energy but cannot use carbon dioxide as its sole carbon source and thus uses organic compounds from the environment.
Using light for energy, but requiring a source of carbon other than carbon dioxide.
The generation of biological energy from light, together with organic compounds and / or carbon dioxide
Any photochemical reaction leading to the addition of water across a double or triple bond or to a carbonyl group etc.
hydrogen produced (along with oxygen) by the photolytic decomposition of water in certain anaerobic algae etc
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 332. 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.