13-letter words containing a, c, i, s
- apologeticism — An instance of the use of apologetics.
- apostolic age — the earliest period of Christianity, lasting through the death of the last apostle.
- apostolic see — the see of the pope regarded as the successor to Saint Peter
- apostolically — In an apostolic way.
- apperceptions — Plural form of apperception.
- appreciations — Plural form of appreciation.
- aquaculturist — a person who practises aquaculture
- arachnivorous — Spider-eating.
- arachnoiditis — an inflammation of the arachnoid membrane
- archaeologist — a specialist in archaeology, the scientific study of prehistoric peoples and their cultures by analysis of their artifacts, inscriptions, monuments, etc.
- archaic smile — a conventional representation of the mouth characterized by slightly upturned corners of the lips, found especially on Greek sculpture produced prior to the 5th century b.c.
- archbishopric — the rank, office, or jurisdiction of an archbishop
- archeologists — archaeology.
- archipelagoes — Plural form of archipelago.
- architectures — Plural form of architecture.
- arcticologist — a person who specializes in arcticology.
- arcus senilis — an opaque circle around the cornea of the eye, often seen in elderly people
- arias sanchez — Oscar. born 1940, Costa Rican statesman; president (1986–90, 2006–2010); Nobel peace prize 1987
- aristocracies — Plural form of aristocracy.
- aristocratism — the principles of aristocrats
- aristolochene — (organic compound) A bicyclic sesquiterpene produced by certain fungi.
- arkansas city — a city in S Kansas.
- armistice day — the anniversary of the signing of the armistice that ended World War I, on Nov 11, 1918, now kept on Remembrance Sunday
- arsenous acid — a toxic white powder, As2O3, used to make other arsenic compounds, insecticides, and preservatives; white arsenic
- arthroscopies — Plural form of arthroscopy.
- articulations — Plural form of articulation.
- arundinaceous — resembling a reed
- as much again — twice as much
- ascension day — the 40th day after Easter, when the Ascension of Christ into heaven is celebrated
- ascensiontide — the ten days from Ascension Day to the day before Whit Sunday
- ascertainable — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- ascertainably — In a way that can be ascertained.
- ascertainment — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- aschelminthes — a major grouping (formerly a phylum) of small-to-microscopic pseudocoelomate organisms, as the rotifers, nematodes, and gastrotriches, all of which are now classified as separate phyla.
- ascoli piceno — a town in E central Italy, in the Marches: capital of the Roman province of Picenum; site of the massacre of all its Roman citizens in the Social War in 90 bc. Pop: 51 375 (2001)
- ascorbic acid — Ascorbic acid is another name for vitamin C.
- aspartic acid — nonessential amino acid that is a component of proteins and acts as a neurotransmitter
- associability — the condition of or the capacity to be associable or linked or related in thinking
- associateship — to connect or bring into relation, as thought, feeling, memory, etc.: Many people associate dark clouds with depression and gloom.
- associational — relating to association or alliance or an association, alliance or affiliation
- associatively — in an associative or connective manner
- associativity — the quality of being associative
- astacological — relating to astacology
- asthmatically — In an asthmatic manner.
- astrodynamics — the study of the motion of natural and artificial bodies in space
- astronautical — of or relating to astronautics or astronauts.
- astroparticle — (astrophysics) A subatomic particle of cosmic origin.
- astrophysical — Of or pertaining to astrophysics.
- at a discount — below the regular price
- atamasco lily — any of a genus (Zephyranthes) of bulbous plants of the lily family, with hollow stems, grassy leaves, and funnel-shaped flowers of yellow, pink, red, or purple-tinged white