A synthetic antibiotic drug used chiefly in the form of its salt C₂₃H₃₆N₄O₁₀S₂ especially to treat protozoal infections (such as leishmaniasis) and to prevent pneumocystis pneumonia.

pentamillionairenoun

A person whose wealth amounts to five million dollars (or other currency unit).

pentamirrornoun

A system of three (not five) mirrors used as a cheaper substitute to a pentaprism in the viewfinders of some single-lens reflex cameras

pentamolybdatenoun

The polymeric anion composed of Mo₅O₁₆²⁻ clusters; any salt containing this anion

pentamoraicadj

Having five morae.

pentamorphnoun

A polymorph that has five forms

pentamorphicadj

having five distinct forms

pentamorphonenoun

14β-pentylaminomorphinone, a semisynthetic opiate derivative and analgesic.

pentamutationnoun

A group of five mutations

pentanaldehydenoun

pentanal

pentandrianadj

Of or relating to the class Pentandria; having five stamens.

pentandrousadj

Of or relating to the Linnean class Pentandria; having five stamens.

pentanenoun

An aliphatic hydrocarbon of chemical formula C₅H₁₂; either of the three isomers n-pentane, methylbutane (isopentane), and dimethylpropane (neopentane); volatile liquids under normal conditions.

pentanediolnoun

Any of several isomeric diols derived from pentane

pentanedithiolnoun

Any of many isomeric dithiols derived from pentane, but especially 1,5-pentanedithiol that has several industrial applications

pentanglenoun

A pentagram.

pentangularadj

Having five corners or angles.

pentangularitynoun

The quality of being pentangular (having 5 angles, corners, or sides).

pentangularlyadv

In a pentangular manner.

pentanitridenoun

Any nitride containing five nitrogen atoms

pentanoatenoun

Any salt or ester of pentanoic acid.

pentanoicadj

Of or pertaining to pentanoic acid or its derivatives

pentanolnoun

Any of several isomers of the alcohol C₅H₁₁OH; the principal constituents of fusel oil.

pentanoxymethylnoun

An alkoxymethyl radical in which R is a pentyl group

pentanuclearadj

Having five nuclei

pentanucleotidenoun

A codon containing five nucleotides.

pentanucleotidicadj

Relating to or composed of pentanucleotides.

pentaoxonoun

A chemical compound with five oxygen atoms with double bonds.

pentaoxolanenoun

The unstable allotrope of oxygen (O₅) composed of a ring of five atoms

pentapalladiumnoun

Five palladium atoms or ions in a compound (Pd₅).

pentapedaladj

Using five legs (in reality, four legs and a tail) in order to walk

pentapeptidasenoun

Any enzyme that catalyses the hydrolysis of a pentapeptide

pentapeptidenoun

An oligopeptide formed from five amino acids.

pentapeptidicadj

Relating to or composed of pentapeptides.

pentapetalousadj

Having five petals.

pentaphenylnoun

Five phenyl radicals in a molecule

pentaphilianoun

love of the number 5

pentaphonicadj

Composed of five notes

pentaphosphatenoun

A compound having five phosphate groups

pentaphosphidenoun

Any phosphide containing five phosphorus atoms

pentaphosphorusnoun

five atoms of phosphorus in a compound

pentaphosphorylatedadj

phosphorylated with five units of phosphoric acid

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 211. 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.