English Words: O

15,494 words · Page 117 of 310

Resembling or characteristic of an oocyte.

oocytogenesisnoun

The creation and development of oocytes

OODAphrase

Initialism of Observe, Orient, Decide, and Act, a decision cycle for military combat operations and other processes.

Having two reproductive duct systems, a hermaphroditic one for copulation and one for depositing eggs.

singular of oodles

unspecified large amount, number, or quantity; lots, tons.

An ovicell of a bryozoan.

gooey; sticky

oofintj

A sound mimicking the loss of air, as if someone's solar plexus had just been struck.

Any source or supplier of money.

An ootaxon, equivalent to a family, used to classify fossilised dinosaur eggs

ooffintj

Alternative form of oof.

The quality of being wealthy.

Short of money; poor.

A mild expression of error, dismay, or concern (often in a comical sense).

Money.

Having lots of oof (money); rich, wealthy.

Mimicking caveman speech.

The female gamete; the egg cell or oosphere.

Of or relating to oogamy

In an oogamous manner.

A form of anisogamy (heterogamy) in which the female gamete (e.g. ovum) is significantly larger than the male gamete (sperm) and is non-motile.

The formation and development of an oocyte or ovum

Of or pertaining to oogenesis.

That produces oocytes

The egg-forming apparatus in trematodes.

An ootaxon, equivalent to a genus, used to classify fossilised dinosaur eggs

A hobo or transient who is homeless by choice rather than necessity.

of or pertaining to an oogonium

A particular fungal sex hormone.

An immature ovarian egg within a developing fetus.

An image, typically of parasite eggs, produced by oography

A mechanical device for drawing the outline of a bird's egg.

Synonym of bearded seal.

oohintj

An expression of surprise.

Alternative form of oo arr.

A reply implying pretentiousness; often in response to another person's use of a big word, especially a loanword that English got from French.

ooh ooh aah aahintj

Alternative spelling of oo oo aa aa.

ooh, matronintj

Highlights a statement which contains a double entendre or appears sexually forward.

Synonym of oo oo aa aa (“used to represent the sound of a monkey's cry”).

Expressing astonishment, admiration, dismay, excitement etc.

One who oohs (in various senses).

An ooh sound.

Ooiname

A surname, most commonly found in Malaysia and Singapore.

ooidnoun

A small calcium carbonate or iron coated grain found on the seafloor.

Egg-shaped.

Something whose name is unknown or unimportant; a thingy; a whatsit.

oojah capivvynoun

Something that one cannot name or does not know the name of; a whatsit.

oojah-cum-spiffadj

In good condition, fine, excellent.

Something that one does not know the name of.

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 117. 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.