9-letter words containing o
- acronical — happening at sunset, as the rising of a star
- acronymed — a word formed from the initial letters or groups of letters of words in a set phrase or series of words and pronounced as a separate word, as Wac from Women's Army Corps, OPEC from Organization of Petroleum Exporting Countries, or loran from long-range navigation.
- acronymic — a word formed from the initial letters or groups of letters of words in a set phrase or series of words and pronounced as a separate word, as Wac from Women's Army Corps, OPEC from Organization of Petroleum Exporting Countries, or loran from long-range navigation.
- acropathy — any disease of the extremities.
- acropetal — (of leaves and flowers) produced in order from the base upwards so that the youngest are at the apex
- acrophobe — a person who is abnormally afraid of heights
- acrophony — the use of symbols to represent sounds
- acropolis — the citadel of an ancient Greek city
- acrosomal — relating to the acrosome
- acrosomes — Plural form of acrosome.
- acrospire — the first shoot developing from the plumule of a germinating grain seed
- acrospore — a spore borne at the tip of a sporophore, as a basidiospore.
- acrostics — Plural form of acrostic.
- acroteria — acroters
- actinopod — any protozoan of the phylum Actinopoda, such as a radiolarian or a heliozoan, having stiff radiating cytoplasmic projections
- actionary — (business, obsolete) A shareholder in a joint-stock company.
- actioners — Plural form of actioner.
- actioning — Present participle of action.
- actionist — a person who is bent on (spoken) action
- activator — a thing or person that activates
- actuation — to incite or move to action; impel; motivate: actuated by selfish motives.
- actuators — Plural form of actuator.
- acuminous — keen insight; shrewdness: remarkable acumen in business matters.
- acupoints — Plural form of acupoint.
- acusector — a needle for cutting tissue by means of a high-frequency electric current.
- acyclovir — an antiviral drug used to treat herpes. Formula: C8H11N5O3
- acylation — the introduction into a chemical compound of an acyl group
- adaptions — the act of adapting.
- adaptogen — any of various natural substances used in herbal medicine to normalize and regulate the systems of the body
- add up to — If amounts add up to a particular total, they result in that total when they are put together.
- adderwort — the bistort, a herbaceous flowering plant, Polygonum bistorta, of the dock family
- addiction — Addiction is the condition of taking harmful drugs and being unable to stop taking them.
- addington — Henry, 1st Viscount Sidmouth. 1757–1844, British statesman; prime minister (1801–04) and Home Secretary (1812–21)
- additions — Plural form of addition.
- addressor — a speech or written statement, usually formal, directed to a particular group of persons: the president's address on the state of the economy.
- adduction — an adducing or citing
- adductors — Plural form of adductor.
- ademption — the failure of a specific legacy, as by a testator disposing of the subject matter in his lifetime
- adenoidal — having the nasal tones or impaired breathing of one with enlarged adenoids
- adenology — the branch of medicine dealing with the development, structure, function, and diseases of glands.
- adenomata — a benign tumor originating in a secretory gland.
- adenosine — a nucleoside formed by the condensation of adenine and ribose. It is present in all living cells in a combined form, as in ribonucleic acids. Formula: C10H13N5O4
- adenotomy — (anatomy) Dissection of, or incision into, a gland or glands.
- adeodatus — Saint, died a.d. 676, pope 672–676.
- adhesions — Plural form of adhesion.
- adhocracy — management that responds to urgent problems rather than planning to avoid them
- adiaphora — matters of indifference
- adipocere — a waxlike fatty substance formed during the decomposition of corpses
- adipocyte — a fat cell that accumulates and stores fats
- adipokine — (biochemistry) Any of several cytokines secreted by adipose tissue.