Meaning: A prefix meaning 'star' or 'celestial'.

Part of speech: prefix

Example: The term 'astronomy' uses the prefix astro-.

Category: Science

Meaning: An ancient instrument used to make astronomical measurements.

Part of speech: noun

Example: The astrolabe was used by sailors for navigation.

Category: Science › Astronomy

Synonyms:

• navigation tool
• measuring device

Meaning: A person who studies the movements of celestial bodies and their influence on human affairs.

Part of speech: noun

Example: The astrologer predicted the future based on the stars.

Category: Science › Astronomy

Synonyms:

• forecaster
• seer

Meaning: Relating to astrology.

Part of speech: adjective

Example: She read her astrological chart.

Category: Science › Astronomy

Synonyms:

• zodiacal
• horoscopic

Meaning: The study of the movements of celestial bodies and their influence on human affairs.

Part of speech: noun

Example: Many people believe in astrology.

Category: Science › Astronomy

Synonyms:

• horoscopy
• zodiac

Meaning: The branch of astronomy that deals with the measurement of the positions and movements of celestial bodies.

Part of speech: noun

Example: Astrometry is essential for understanding the universe.

Category: Science › Astronomy

Synonyms:

• celestial measurement
• astronomical measurement

Meaning: A person trained to travel in space.

Part of speech: noun

Example: The astronaut conducted experiments on the space station.

Category: Science › Astronomy

Synonyms:

• space traveler
• cosmonaut

Meaning: A scientist who studies celestial bodies and the universe.

Part of speech: noun

Example: The astronomer discovered a new planet.

Category: Science › Astronomy

Synonyms:

• scientist
• astrophysicist

Meaning: Extremely large or great.

Part of speech: adjective

Example: The costs of the project were astronomical.

Synonyms:

• enormous
• immense

Antonyms:

• tiny
• small

Meaning: A unit of measurement equal to the average distance from the Earth to the Sun, approximately 93 million miles or 150 million kilometers.

Part of speech: noun

Example: The distance to the nearest star is about four light years or 268,000 astronomical units.

Category: Science › Astronomy

Meaning: The scientific study of celestial bodies, space, and the universe as a whole.

Part of speech: noun

Example: Astronomy helps us learn about planets and stars.

Category: Science

Synonyms:

• stargazing
• cosmology

Meaning: A scientist who specializes in astrophysics.

Part of speech: noun

Example: An astrophysicist studies the properties of stars and galaxies.

Category: Science › Astronomy

Synonyms: cosmologist

Meaning: The branch of astronomy concerned with the physical properties and behavior of celestial bodies and the universe.

Part of speech: noun

Example: Astrophysics combines physics and astronomy to understand the universe.

Category: Science › Astronomy

Synonyms: cosmophysics

Meaning: The envelope of gases surrounding the Earth or another planet.

Part of speech: noun

Example: The atmosphere protects us from harmful space radiation.

Synonyms:

• air
• environment

Antonyms:

• vacuum
• emptiness

Meaning: Relating to the atmosphere.

Part of speech: adjective

Example: Atmospheric pressure affects weather patterns.

Category: Science

Synonyms:

• airborne
• aerial

Meaning: The study of the atmosphere and its phenomena.

Part of speech: noun

Example: Atmospherics can help predict weather changes.

Category: Science

Meaning: The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Part of speech: noun

Example: An atom is made up of protons, neutrons, and electrons.

Category: Science › Chemistry

Synonyms:

• particle
• molecule

Meaning: A bomb that uses nuclear reactions to release a massive amount of energy.

Part of speech: noun

Example: The atom bomb was developed during World War II.

Category: Science › Physics

Synonyms: nuclear bomb

Meaning: Relating to atoms or atomic energy.

Part of speech: adjective

Example: Atomic energy can be harnessed for power.

Category: Science › Physics

Synonyms:

• nuclear
• subatomic

Meaning: A clock that uses the vibrations of atoms to measure time with high precision.

Part of speech: noun

Example: An atomic clock is used to keep accurate time in GPS systems.

Category: Science › Physics

Synonyms: precision clock

Meaning: The mass of an atom, typically expressed in atomic mass units (amu).

Part of speech: noun

Example: The atomic mass of carbon is approximately 12 amu.

Category: Science › Chemistry

Synonyms: atomic weight

Meaning: The number of protons in the nucleus of an atom, which determines the element's identity.

Part of speech: noun

Example: The atomic number of hydrogen is 1.

Category: Science › Chemistry

Meaning: The spectrum of frequencies of electromagnetic radiation emitted by an atom.

Part of speech: noun

Example: The atomic spectrum can be used to identify elements.

Category: Science › Physics

Meaning: The theory that matter is composed of discrete units called atoms.

Part of speech: noun

Example: Atomic theory is fundamental to modern chemistry.

Category: Science › Chemistry

Synonyms: atomic model

Meaning: The average mass of an element's atoms, usually expressed in atomic mass units (amu).

Part of speech: noun

Example: The atomic weight of oxygen is approximately 16 amu.

Category: Science › Chemistry

Synonyms: atomic mass

Meaning: The number of atoms in a molecule or the property of being atomic.

Part of speech: noun

Example: Atomicity is important in understanding molecular structures.

Category: Science › Chemistry

Meaning: The theory that matter is composed of discrete units called atoms.

Part of speech: noun

Example: Atomism has been a fundamental concept in science.

Category: Science › Chemistry

Synonyms: atomic theory

Meaning: To break down into atoms or smaller particles.

Part of speech: verb

Example: The scientist aimed to atomize the substance for analysis.

Category: Science › Chemistry

Synonyms:

• fragment
• disintegrate

Meaning: Adenosine triphosphate; a molecule that carries energy within cells.

Part of speech: noun

Example: ATP is essential for cellular processes.

Category: Science › Biology

Synonyms: energy molecule

Meaning: The reduction of the force, effect, or value of something.

Part of speech: noun

Example: The attenuation of the signal was noticeable.

Category: Science › Physics

Synonyms:

• reduction
• diminution

Antonyms:

• increase
• amplification

Meaning: A metric prefix indicating a factor of 10^-18.

Part of speech: prefix

Example: An attometer is one quintillionth of a meter.

Category: Science › Measurement

Meaning: To draw someone or something towards oneself.

Part of speech: verb

Example: The flowers attract bees.

Category: Science › Biology

Synonyms:

• draw
• entice

Antonyms:

• repel
• deter

Meaning: A substance that attracts organisms or insects.

Part of speech: noun

Example: The attractant lured the moths to the trap.

Category: Science › Biology

Synonyms:

• lure
• bait

Meaning: The action or power of drawing someone or something towards oneself.

Part of speech: noun

Example: There is a strong attraction between them.

Category: Science › Physics

Synonyms:

• appeal
• charm

Antonyms:

• repulsion
• aversion

Meaning: Able to be assigned to a particular cause or source.

Part of speech: adjective

Example: The success is attributable to hard work.

Category: Science › Research

Synonyms:

• ascribable
• assignable

Antonyms:

• unattributable
• unassignable

Meaning: A quality or characteristic of someone or something.

Part of speech: noun

Example: Honesty is an important attribute in a leader.

Category: Science › Psychology

Synonyms:

• quality
• trait

Antonyms:

• flaw
• deficiency

Meaning: The act of assigning a quality or characteristic to someone or something.

Part of speech: noun

Example: Attribution of success to teamwork is common.

Category: Science › Psychology

Synonyms:

• assignment
• ascription

Meaning: Astronomical unit, a measure of distance in space.

Part of speech: noun

Example: One AU is the average distance from the Earth to the Sun.

Category: Science › Astronomy

Synonyms:

• distance unit
• astronomical measure

Meaning: Related to the sense of hearing.

Part of speech: adjective

Example: He has strong auditory skills.

Category: Science › Biology

Synonyms:

• hearing-related
• acoustic

Meaning: Related to the ear or the sense of hearing.

Part of speech: adjective

Example: He has excellent aural skills for music.

Category: Science › Biology

Synonyms:

• auditory
• hearing-related