9-letter words containing s, a, d, i
- agnus dei — the figure of a lamb bearing a cross or banner, emblematic of Christ
- aids test — a blood test that detects whether the blood sample contains antibodies to the human immunodeficiency virus (HIV) and thus whether a person has or is likely to develop AIDS
- airdromes — Plural form of airdrome.
- airfields — Plural form of airfield.
- airy disc — the bright central part of the diffraction pattern of light from a point source that is diffracted by a circular aperture.
- alcimedes — the mother of Jason.
- algicides — Plural form of algicide.
- algidness — the state or quality of being algid
- alkaloids — Plural form of alkaloid.
- alkoxides — Plural form of alkoxide.
- alongside — If one thing is alongside another thing, the first thing is next to the second.
- altitudes — Plural form of altitude.
- ambleside — a town in NW England, in Cumbria: a tourist centre for the Lake District. Pop: 3064 (2001)
- amidships — Amidships means halfway along the length of a ship.
- ammonoids — Plural form of ammonoid.
- amnestied — a general pardon for offenses, especially political offenses, against a government, often granted before any trial or conviction.
- amortised — Finance. to liquidate or extinguish (a mortgage, debt, or other obligation), especially by periodic payments to the creditor or to a sinking fund. to write off a cost of (an asset) gradually.
- amphipods — Plural form of amphipod.
- andalusia — a region of S Spain, on the Mediterranean and the Atlantic, with the Sierra Morena in the north, the Sierra Nevada in the southeast, and the Guadalquivir River flowing over fertile lands between them; a centre of Moorish civilization; it became an autonomous region in 1981. Area: about 87 280 sq km (33 700 sq miles)
- andesitic — relating to, or containing, andesite
- androides — Dated form of android.
- anecdysis — the period between moults in arthropods
- anguished — Anguished means showing or feeling great mental suffering or physical pain.
- anisidine — (organic compound) Any of three three isomeric forms of the aromatic amine methoxyaniline; they are toxic, and are used in the synthesis of azo dyes and pharmaceuticals.
- annalised — Simple past tense and past participle of annalise.
- anti-skid — intended to prevent vehicles from skidding
- antidotes — Plural form of antidote.
- antinodes — Plural form of antinode.
- antipodes — People sometimes refer to Australia and New Zealand as the Antipodes.
- anybodies — a person of some importance: If you're anybody, you'll receive an invitation.
- appraised — Simple past tense and past participle of appraise.
- apsidiole — a secondary, or small, apse
- aptitudes — Plural form of aptitude.
- aquitards — Plural form of aquitard.
- arachnids — Plural form of arachnid.
- aridities — being without moisture; extremely dry; parched: arid land; an arid climate.
- aristides — known as Aristides the Just. ?530–?468 bc, Athenian general and statesman, who played a prominent part in the Greek victories over the Persians at Marathon (490), Salamis (480), and Plataea (479)
- arsenides — Plural form of arsenide.
- asafetida — a bad-smelling gum resin obtained from various Asiatic plants (genus Ferula) of the umbel family: it was formerly used to treat some illnesses or, in folk medicine, to repel disease
- asbestoid — Mineralogy. a fibrous mineral, either amphibole or chrysotile, formerly used for making incombustible or fireproof articles.
- ascarides — any parasitic roundworm of the genus Ascaris, found in the human small intestine and causing colic and diarrhea.
- ascending — If a group of things is arranged in ascending order, each thing is bigger, greater, or more important than the thing before it.
- ascidians — Plural form of ascidian.
- ascidiate — of or relating to the tunicate molluscs of the genus Ascidium
- asclepiad — a plant that belongs to the class Asclepiadaceae
- asiderite — an iron-free meteorite consisting of friable material.
- aspidioid — relating to an aspidium
- aspirated — (of a stop) articulated with some force, so that breath escapes with audible friction as the stop is released
- assidious — Misspelling of assiduous.
- assiduity — constant and close application