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13,140 words — headwords with part of speech, pronunciation, and a plain-language definition.

acervar: to pile up
acervo: heritage; heap, pile
acervo genético: gene pool
acerámico: pre-pottery
acería: steelworks (place where steel is manufactured and/or shaped)
acesulfamo: acesulfame
acetabular: acetabular
acetal: acetal
acetaldehído: acetaldehyde, ethanal
acetalización: acetalization
acetamida: acetamide (amide of acetic acid)
acetaminofeno: acetaminophen
acetaminofén: acetaminophen; paracetamol
acetato: acetate
acetazolamida: acetazolamide
acetificar: to acetify (convert into acid or vinegar)
acetilación: acetylation
acetilado: acetylated
acetilcisteína: acetylcysteine (an acetylated form of the amino acid cysteine (trademark Mucomyst), which is an antioxidant used as a mucolytic agent and in the treatment of paracetamol poisoning)
acetilcolina: acetylcholine (a neurotransmitter in humans and other animals)
acetilcolinesterasa: acetylcholinesterase (an enzyme that catalyzes the hydrolysis of the neurotransmitter acetylcholine into choline and acetic acid)
acetileno: acetylene
acetilgalactosamina: acetylgalactosamine
acetilglucosamina: acetylglucosamine (an amide derivative of glucose that forms part of the peptidoglycan of bacterial cell walls)
acetilmanosamina: acetylmannosamine
acetilmetadol: acetylmethadol
acetilmurámico: acetylmuramic
acetilneuraminato: acetylneuraminate
acetilneuramínico: acetylneuraminic
acetilo: acetyl
acetilsalicilato: acetylsalicylate
acetilsalicílico: acetylsalicylic
acetiltransferasa: acetyltransferase, transacetylase
acetiluro: acetylide (any organic compound derived from acetylene or a terminal acetylene by replacing a hydrogen atom with a metal)
acetilénico: acetylenic
acetoacetato: acetoacetic acid
acetoacético: acetoacetic
acetofenona: acetophenone
acetona: acetone (a colourless, volatile, flammable liquid ketone, (CH₃)₂CO, used as a solvent)
acetonitrilo: acetonitrile
acetosa: sorrel (plant)
acetre: situla
acetábulo: vinegar cup; acetabulum
acetímetro: acetimeter (an instrument)
acetónido: acetonide
aceytuni: synonym of raso: satin
acezante: puffing, panting or out of breath
acezar: to pant; to yearn; to crave
aceña: water mill; flour mill; water wheel; bulrush, cattail (Typha latifolia)
achacable: ascribable; attributable to
achacacheño: of, from or relating to Achacachi (town in Bolivia)
achacacheño: native or inhabitant of Achacachi (town in Bolivia) (usually male)
achacar: to attribute (something to someone); to blame
achachairú: Garcinia humilis (small tree grown for its fruit)
achacoso: sickly, ailing; chesty (having a cold)
achaflanar: to chamfer
achampanado: bubbly, fizzy
achantar: to scare, to put off
achaparra: only used in se achaparra, third-person singular present indicative of achaparrarse
achaparrad: only used in os ... achaparrad, syntactic variant of achaparraos, second-person plural imperative of achaparrarse