13-letter words starting with a
- all-pervading — spreading through or into everything
- allegorically — consisting of or pertaining to allegory; of the nature of or containing allgegory; figurative: an allegorical poem; an allegorical meaning.
- allelomorphic — relating to alleles
- allergenicity — causing allergic sensitization.
- allhallowtide — the season of All Saints' Day (Allhallows)
- allied health — a segment of healthcare professions comprised of specialized occupations that require certification, including physical therapists, dental hygienists, social workers, speech therapists, nutritionists, etc., but not including doctors, nurses, and dentists.
- alligator gar — a large, heavily scaled fish, Lepisosteus spatula, with an elongated body and long snout, found mainly in shallow weedy fresh water in the southeastern U.S.
- alligatorfish — a slender marine fish, Aspidophoroides monopterygius, of Atlantic seas, having overlapping plates covering the body.
- alliterations — Plural form of alliteration.
- allochromatic — Physical Chemistry. pertaining to or having photochemical properties resulting from an impurity or from exposure to radiation.
- allochthonous — (of rocks, deposits, etc) found in a place other than where they or their constituents were formed
- allophanamide — biuret.
- allopolyploid — (of cells, organisms, etc) having more than two sets of haploid chromosomes inherited from different species
- allotriomorph — (geology) A mineral that did not develop its otherwise typical external crystal form because of late crystallization between earlier formed crystals, typical of matrix minerals in rapidly crystallizing volcanic lavas and shallow igneous intrusions.
- allotriophagy — (rare) Having food cravings that are different from the expected or the norm.
- allotypically — in the manner of an allotype
- allowable cut — the amount of a natural resource, as grain or oil, that may be harvested or taken from the earth within a specified period, as limited by law for conservation.
- allowableness — the quality of being allowable
- alluvial cone — a steep, narrow, cone-shaped alluvial fan formed where a swift stream suddenly slows down, as where an upland stream emerges abruptly into a level plain
- allyl alcohol — a colourless pungent poisonous liquid used in the manufacture of resins, plasticizers, and other organic chemicals. Formula: CH2:CHCH2OH; relative density: 0.85; melting pt: –129°C; boiling pt: 96.9°C
- allyl sulfide — a colorless or pale yellow, water-insoluble liquid, C 6 H 10 S, having a garlicky odor, used chiefly in flavoring.
- allylthiourea — thiosinamine.
- almond willow — a deciduous shrub or small tree, Salix triandra, a species of willow native to Europe and W and Central Asia that has flowers which produce catkins and leaves similar in shape to those of the almond tree
- almond-shaped — oval
- along the way — If something happens on the way or along the way, it happens during the course of a particular event or process.
- alongshoreman — a person employed to load and unload ships
- alonzo church — (person) A twentieth century mathematician and logician, and one of the founders of computer science. Church invented the lambda-calculus and posited a version of the Church-Turing thesis.
- alpha aquilae — Altair
- alpha aurigae — Capella
- alpha blocker — any of various substances that interfere with the action of the alpha receptors.
- alpha carinae — Canopus1
- alpha emitter — a radioactive isotope that emits alpha particles
- alpha eridani — Achernar
- alpha orionis — Betelgeuse
- alpha scorpii — Antares
- alpha testing — (programming) Testing of software at the developer's site by the customer. The stage before beta testing.
- alpha-blocker — any of a class of drugs that prevent the stimulation of alpha adrenoceptors, a type of receptor in the sympathetic nervous system, by adrenaline and noradrenaline and that therefore cause widening of blood vessels: used in the treatment of high blood pressure and prostatic hyperplasia
- alphabet code — a list of easily distinguishable words, each representing a letter of the alphabet, used in radio and telephonic communications.
- alphabet soup — a confusing series of acronyms or abbreviations
- alphabetarian — a person learning, or studying, the alphabet
- alphabetiform — having similarities to letters of the alphabet
- alphabetizing — Present participle of alphabetize.
- alphanumerics — Plural form of alphanumeric.
- alpine azalea — a low, branching shrub, Loiseleuria procumbens, of northern regions, having evergreen leaves and clusters of white or pink flowers.
- alpine chough — a bird of the crow family, Pyrrocorax graculus, found in the highest mountain regions of S Europe and central Asia, with a yellow bill, black plumage, and red legs
- alpine garden — a rock garden.
- alpine tundra — a tundra that is treeless because of high elevation rather than high latitude.
- alsike clover — a European clover, Trifolium hybridum, having pink flowers, grown in the U.S. for forage.
- alstroemerias — Plural form of alstroemeria.
- alterableness — The state or quality of being alterable.