English Words: O
15,494 words · Page 149 of 310
A cookie made of two wafers joined with a sugary filling, particularly a Nabisco cookie with two alkalized cocoa-powder wafers around a white creme filling.
A black person that appears to the community to embody the social and cultural features of a white person
Archaic form of orographic (“connected to orography (the scientific study of mountains)”).
A white crystalline substance which is obtained indirectly from the root of an umbelliferous plant, Oreoselinum majus (formerly Imperatoria oreoselinum), and yields resorcin on decomposition.
The son of Agamemnon and Clytemnestra, who killed his mother, avenging his father's death, and was then pursued by the Furies.
A synthetic steroidal estrogen, the 3-propanoyl, 17-(1-cyclohexenyl) ether of estradiol.
The affective and conative character of mental activity as contrasted with its cognitive aspect; the appetitive aspect of an act; desire, appetite.
An exanthemous disease caused by a parapox virus, occurring primarily in sheep and goats but also capable of infecting humans.
A way to teach music to children using improvisation, speech, movement and rhythm, centered on the idea that "feeling precedes understanding".
A person (living or dead) from whom an organ is removed in order to be transplanted into another person.
A large, portable firearm normally supported by wheels, in which bullets may be fired from a row of several tubes in succession; it was chiefly used from the 14th to the 17th century.
The gallery or raised platform within a church or hall from which an organ is played, though not necessarily housing the organ itself.
A juxtaoral organ composed of nests of benign squamoid epithelium closely associated with multiple nerve bundles.
Part of the cochlea of the inner ear in mammals, provided with hair cells or auditory sensory cells.
A chromaffin body derived from the neural crest located at the bifurcation of the aorta or at the origin of the inferior mesenteric artery. It may be the source of a paraganglioma.
A tuned metal or wooden tube connected mechanically or electrically to an organ console.
A cactus (family Cactaceae) (Stenocereus thurberi, syn. Glandulicereus thurberi), widespread in Mexico.
Spelling & Dictionary Insight
The English alphabetical index for the letter O contains 15,494 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 310 pages, and you are currently viewing page 149. 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 "O" 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.