English Words: X
1,183 words · Page 1 of 24
A mammalian sex chromosome: in the XY sex-determination system, cells of females typically have a pair of X chromosomes, while cells of males typically have an X and a Y.
An unknown or hard-to-define influence; a factor with unknown or unforeseeable consequences.
A prize, usually a multi-million dollar monetary one, offered for a specific scientific or technological advance.
A Mexican broadcast station whose signal overpowers those of stations in the United States.
A unit of length (symbol xu) approximately equal to 0.1 picometres, used to quote the wavelength of X-rays and gamma rays.
A utility knife, usually with a short, sharp, disposable blade mounted on a pen-like body, usually for crafts and hobbies; an X-Acto knife.
A phrase, or, equivalently, a node in a syntax tree, which consists either of: (1) an adjunct and another X-bar phrase, (2) a head, X, and an optional complement, or (3) a conjunction sandwiched between two other X-bars. The X is a "pro-letter" which can be substituted by letters such as N for noun, V for verb, P for preposition, I for inflectional, etc.
A theory that posits a common syntactic structure for different lexical categories. Each phrase (XP) is the projection of a head (X) and may optionally include a specifier (sister of X-bar, daughter of XP), adjuncts (sister and daughter of X-bar) and complements (sister of X, daughter of X-bar).
A type of Brazilian sandwich consisting of sliced buttered marraqueta bread and other ingredients.
Any of various diseases of plants or animals whose origin was at first a mystery, especially:
Of, pertaining to, or characteristic of the paranormal investigation science fiction television series The X-Files.
A non-linear strand of DNA where certain cruciform binding proteins can compete for binding.
Short wavelength electromagnetic radiation usually produced by bombarding a metal target in a vacuum. Used to create images of the internal structure of objects; this is possible because X-rays pass through most objects and can expose photographic film.
Vision into the X-ray portion of the light spectrum, enabling visibility through certain solid matter.
A SAMPA-inspired transcription of the entire International Phonetic Alphabet (IPA) into ASCII.
A pair of flat or curved stretchers, on a chair etc., that often have a knob at the intersection
A convention whereby Esperanto’s circumflex accents (ĉ, ĝ, ĥ, ĵ, ŝ, ŭ) are replaced by an x after the non-diacriticked letter (cx, gx, hx, jx, sx, ux), for convenience of typing.
The fictional world, or universe, which serves as the setting for the Marvel Comics and film series featuring the characters the X-Men.
Spelling & Dictionary Insight
The English alphabetical index for the letter X contains 1,183 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 24 pages, and you are currently viewing page 1. 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 "X" 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.