Science Words That Start With A – Complete List of 150+

Some science words that start with a describe objects, processes, and ideas in science. Words like atom, absorption, acceleration, and anaerobic highlight important concepts and help learners understand how vocabulary explains scientific phenomena.

Using these science words that start with a strengthens English vocabulary and helps learners describe scientific ideas, experiments, and processes accurately.

List of Science Words That Start With A

• Abiotic
• Acid
• Atom
• Aerobic
• Autotroph
• Amorphous
• Adaptation
• Alloy
• Agar
• Allele
• Absorption
• Aggregate
• Alkaline
• Algae
• Anemometer
• Antibody
• Axon
• Amplifier
• Antibiotic
• Archaeology
• Atmosphere
• Aurora
• Asexual
• Asteroid
• Aquifer
• Alveoli
• Asthma
• Avalanche
• Amino
• Anemone

Three Letter Science Words That Start With A

• Act
• Arc
• Air
• Amp
• Ant
• Awe
• Ado
• Ail
• Alb

Four Letter Science Words That Start With A

• Atom
• Acid
• Apex
• Area
• Agar
• Alga
• Aura
• Axle
• Auto
• Amin

Five Letter Science Words That Start With A

• Alloy
• Amino
• Angle
• Amine
• Axial
• Algae
• Aroma
• Anode
• Aorta
• Adapt

Six Letter Science Words That Start With A

• Anther
• Aerial
• Arcane
• Albedo
• Alumna
• Arctic
• Axonem
• Advent
• Arcing
• Artery

Seven Letter Science Words That Start With A

• Actinic
• Anatomy
• Allergen
• Aerobic
• Alkaline
• Apoptos
• Aquifer
• Adhesin
• Autotroph
• Amylase

Science Words That Start With A Ending With Vowels or Consonants

Words That Start With A and End With A

• Amoeba
• Angina
• Anemia
• Alfalfa
• Asthma
• Areca

Words That Start With A and End With E

• Ablate
• Accrete
• Absence
• Adhere
• Alkaline
• Aerate

Words That Start With A and End With I

• Aioli
• Anemoi
• Arteri
• Amici

Words That Start With A and End With O

• Albedo
• Albino
• Averso
• Avocado
• Alstro

Words That Start With A and End With U

• Ailuru
• Arou
• Anemou

Science Words That Start With A Containing Repeating Letters

Words With Double A

• Alkaline
• Amalgam
• Alfalfa
• Alaract

Words With Double E

• Aqueous
• Accrete
• Adenine
• Arregee

Words With Double I

• Antipili
• Aminoacid
• Annihili

Words With Double O

• Aortooc
• Astigmo
• Alcohoo

Rare and Specialized Science Words That Start With A

• Abscission: The process of cutting off or shedding, especially in plants.
  • Plants use abscission to drop leaves during autumn.
• Adiabatic: Occurring without loss or gain of heat in a system.
  • Air rises adiabatically in the atmosphere, cooling as it expands.
• Anisotropic: Having properties that vary in different directions.
  • Crystals are anisotropic because they conduct heat differently along different axes.
• Aphelion: The point in a planet’s orbit farthest from the sun.
  • Earth reaches aphelion in early July each year.
• Autotroph: An organism that produces its own food using light or chemical energy.
  • Plants are autotrophs because they perform photosynthesis.
• Anemophil: A plant pollinated by wind.
  • Pine trees are anemophil plants that rely on the wind for pollination.
• Arthropod: An invertebrate animal with a segmented body, exoskeleton, and jointed limbs.
  • Spiders and crabs are types of arthropods.
• Allele: A variant form of a gene found at a specific position on a chromosome.
  • Eye color depends on different alleles inherited from parents.
• Abiogenesis: The natural process of life arising from non-living matter.
  • Scientists study abiogenesis to understand how life started on Earth.
• Axoneme: The central strand of a cilium or flagellum, involved in movement.
  • The axoneme helps sperm cells swim.

Frequently Used Science Words That Start With A

• Atom: The smallest unit of matter that retains the properties of an element.
  • Hydrogen is the simplest atom in the universe.
• Acid: A substance that can donate a proton or accept an electron pair in reactions.
  • Lemon juice contains citric acid.
• Air: The mixture of gases, mainly nitrogen and oxygen, surrounding Earth.
  • Air fills the balloon and allows it to float.
• Alloy: A mixture of two or more metals.
  • Steel is an alloy of iron and carbon.
• Anatomy: The study of the structure of organisms and their parts.
  • Human anatomy includes studying bones, muscles, and organs.
• Algae: Simple, non-flowering, aquatic plants.
  • Pond water often has green algae floating on it.
• Amplitude: The maximum displacement of a wave from its rest position.
  • The amplitude of a sound wave affects its loudness.
• Aerodynamics: The study of how air moves around objects.
  • Engineers test aerodynamics to design faster cars.
• Absorb: To take in or soak up a substance.
  • Sponges absorb water quickly.
• Aperture: An opening through which light passes in cameras or instruments.
  • The camera’s aperture controls how much light enters.

Life, Physical, and Earth Science Words That Start With A

• Abiotic: Non-living components of an environment.
  • Sunlight and temperature are abiotic factors in a habitat.
• Asteroid: A small rocky body orbiting the sun.
  • The asteroid belt lies between Mars and Jupiter.
• Anemometer: A device used to measure wind speed.
  • Meteorologists use an anemometer to track storms.
• Avalanche: A large mass of snow, ice, or rock sliding down a mountain.
  • Skiers must be careful of avalanches in winter.
• Aurora: Natural light displays in the sky near polar regions.
  • The northern lights are a type of aurora.
• Anthropoid: Human-like primates, including monkeys and apes.
  • Anthropoids share many features with humans.
• Archipelago: A group or chain of islands.
  • Indonesia is a large archipelago.
• Alluvium: Soil or sediments deposited by rivers or floods.
  • Farmers grow crops in fertile alluvium-rich lands.
• Aquatic: Related to water environments.
  • Frogs and fish are aquatic animals.

FAQs About Science Words That Start With A