Meaning: Coated or treated with oil.

Part of speech: adjective

Example: The oiled surface made it easier to slide.

Category: Science › Chemistry

Synonyms:

• greased
• lubricated

Meaning: Related to the sense of smell.

Part of speech: adjective

Example: The olfactory nerves are crucial for detecting odors.

Category: Science › Biology

Synonyms: smell-related

Meaning: A suffix used to denote a person who studies a specific field.

Part of speech: suffix

Example: A biologist studies living organisms.

Category: Science

Meaning: A suffix used to denote a field of study or science.

Part of speech: suffix

Example: Biology is the study of living organisms.

Category: Science

Meaning: Relating to vision or the eye.

Part of speech: noun

Example: The optic nerve transmits visual information to the brain.

Category: Science › Ophthalmology

Synonyms:

• visual
• ocular

Meaning: Relating to sight or the eye.

Part of speech: adjective

Example: The optical illusion tricked my eyes.

Category: Science › Ophthalmology

Synonyms:

• visual
• ocular

Meaning: A visual phenomenon that tricks the eye.

Part of speech: noun

Example: The painting created an optical illusion.

Category: Science › Ophthalmology

Synonyms: visual trick

Meaning: The branch of physics that deals with light and vision.

Part of speech: noun

Example: Optics is essential for understanding how lenses work.

Category: Science › Physics

Synonyms: light science

Meaning: The most favorable condition or level.

Part of speech: noun

Example: The optimum for growth is a warm climate.

Category: Science

Synonyms:

• best condition
• ideal level

Meaning: A spherical object or shape.

Part of speech: noun

Example: The globe is an orb representing the Earth.

Category: Science › Geometry

Synonyms:

• sphere
• ball

Meaning: The curved path of a celestial object around a star or planet.

Part of speech: noun

Example: The Earth orbits the Sun.

Category: Science › Astronomy

Synonyms:

• path
• trajectory

Meaning: Relating to an orbit.

Part of speech: adjective

Example: The satellite is in an orbital path around the Earth.

Category: Science › Astronomy

Synonyms: circular

Meaning: A naturally occurring solid material from which a metal or valuable mineral can be extracted.

Part of speech: noun

Example: Iron ore is mined for steel production.

Category: Science › Geology

Synonyms:

• mineral
• rock

Meaning: A living thing, such as a plant or animal.

Part of speech: noun

Example: A bacterium is a single-celled organism.

Category: Science › Biology

Synonyms:

• life form
• creature

Meaning: A type of chemical used in pesticides and herbicides.

Part of speech: noun

Example: Organophosphates are commonly used in agriculture.

Category: Science › Chemistry

Synonyms: pesticide

Meaning: The scientific study of birds.

Part of speech: noun

Example: She is studying ornithology at the university.

Category: Science › Biology

Synonyms: bird study

Meaning: To move or swing back and forth in a regular rhythm.

Part of speech: verb

Example: The fan oscillates to cool the room.

Category: Science › Physics

Synonyms:

• swing
• fluctuate

Meaning: The process of gradual or unconscious assimilation of ideas or knowledge.

Part of speech: noun

Example: He learned about the topic through osmosis.

Category: Science › Biology

Synonyms:

• absorption
• assimilation

Meaning: To turn into bone or bony tissue.

Part of speech: verb

Example: The cartilage will ossify as the child grows.

Category: Science › Biology

Synonyms:

• harden
• calcify

Meaning: The physical universe beyond the earth's atmosphere.

Part of speech: noun

Example: Astronauts travel to outer space.

Category: Science › Astronomy

Synonyms:

• space
• cosmos

Meaning: Farthest away from the center; most external.

Part of speech: adjective

Example: The outermost planets in the solar system are far from the sun.

Category: Science › Astronomy

Synonyms:

• farthest
• most external

Meaning: The movement of something out of a place.

Part of speech: noun

Example: The outflow of water from the reservoir was carefully monitored.

Category: Science › Hydrology

Synonyms:

• discharge
• emission

Meaning: A natural development or result.

Part of speech: noun

Example: The outgrowth of the project was a new community center.

Category: Science › Biology

Synonyms:

• result
• consequence

Meaning: Having too many people for the available resources.

Part of speech: adjective

Example: The city is overpopulated, leading to many social issues.

Category: Science › Demography

Synonyms:

• crowded
• overcrowded

Antonyms: underpopulated

Meaning: The condition of having a population that exceeds the capacity of the environment.

Part of speech: noun

Example: Overpopulation can lead to resource depletion.

Category: Science › Demography

Synonyms: overcrowding

Antonyms: underpopulation

Meaning: To go beyond a target or limit.

Part of speech: verb

Example: The rocket overshot its intended landing zone.

Category: Science › Physics

Synonyms:

• exceed
• overreach

Antonyms: fall short

Meaning: A chemical reaction in which a substance loses electrons.

Part of speech: noun

Example: Oxidation is a key process in cellular respiration.

Category: Science › Chemistry

Synonyms: oxidative reaction

Meaning: A chemical compound containing at least one oxygen atom.

Part of speech: noun

Example: Water is an oxide of hydrogen.

Category: Science › Chemistry

Synonyms: chemical compound

Meaning: To undergo or cause to undergo a chemical reaction with oxygen.

Part of speech: verb

Example: Iron will oxidize when exposed to moisture.

Category: Science › Chemistry

Synonyms:

• rust
• corrode

Meaning: A chemical element essential for life, symbol O.

Part of speech: noun

Example: Oxygen is necessary for respiration.

Category: Science › Chemistry

Synonyms: O2

Meaning: To supply or enrich with oxygen.

Part of speech: verb

Example: The process helps to oxygenate the water.

Category: Science › Biology

Synonyms: aerate

Meaning: A unit of weight equal to one-sixteenth of a pound.

Part of speech: noun

Example: The recipe calls for 8 oz of cheese.

Category: Science › Measurement

Meaning: A gas composed of three oxygen atoms, found in the Earth's stratosphere.

Part of speech: noun

Example: The ozone layer protects us from harmful UV rays.

Category: Science › Atmospheric Science

Meaning: A region of Earth's stratosphere that absorbs most of the Sun's harmful ultraviolet radiation.

Part of speech: noun

Example: The depletion of the ozone layer is a serious environmental issue.

Category: Science › Atmospheric Science

Meaning: Describing products or practices that do not harm the ozone layer.

Part of speech: adjective

Example: We should use ozone-friendly cleaning products.

Category: Science › Environmental Science

Meaning: the amount of material in a given volume

Part of speech: noun

Example: The packing density of the boxes was high.

Category: Science › Physics

Synonyms: bulk density

Meaning: The scientific study of fossils and ancient life forms.

Part of speech: noun

Example: Palaeontology helps us understand the history of life on Earth.

Category: Science › Geology

Synonyms: fossil science

Meaning: A typical example or pattern of something; a model.

Part of speech: noun

Example: The new paradigm in education focuses on student engagement.

Category: Science › Philosophy

Synonyms:

• model
• example

Meaning: Serving as a typical example or pattern.

Part of speech: adjective

Example: His work is considered paradigmatic in the field of sociology.

Category: Science › Philosophy

Meaning: The effect whereby the position or direction of an object appears to differ when viewed from different positions.

Part of speech: noun

Example: Astronomers use parallax to measure the distance to stars.

Category: Science › Astronomy