Meaning: International System of Units, a system of measurement.

Part of speech: noun

Example: The SI unit for mass is the kilogram.

Category: Science › Measurement

Meaning: A unit of electrical conductance.

Part of speech: noun

Example: The circuit had a resistance of 2 siemens.

Category: Science › Physics

Meaning: A unit of measurement for radiation dose.

Part of speech: noun

Example: The doctor explained that the sievert measures the biological effect of radiation.

Category: Science › Radiation

Meaning: The ability to see; vision.

Part of speech: noun

Example: Her sight was affected by the bright sunlight.

Category: Science › Optics

Synonyms:

• vision
• view

Antonyms: blindness

Meaning: Having the ability to see; not blind.

Part of speech: adjective

Example: The sighted person helped guide the blind man.

Category: Science › Optics

Synonyms:

• seeing
• visual

Antonyms: blind

Meaning: The act of seeing or observing something.

Part of speech: noun

Example: The sighting of the rare bird excited the birdwatchers.

Category: Science › Biology

Synonyms:

• observation
• viewing

Meaning: Unable to see; blind.

Part of speech: adjective

Example: The sightless man navigated the streets with confidence.

Category: Science › Optics

Synonyms:

• blind
• visually impaired

Antonyms: sighted

Meaning: The 18th letter of the Greek alphabet, often used in mathematics and science.

Part of speech: noun

Example: In statistics, sigma represents the standard deviation.

Category: Science › Mathematics

Meaning: A gesture, sound, or action that conveys information.

Part of speech: noun

Example: The traffic light is a signal for cars to stop.

Category: Science › Communication

Synonyms:

• indicator
• sign

Meaning: A measure of the level of a desired signal to the level of background noise.

Part of speech: noun

Example: A high signal-to-noise ratio is crucial for clear audio.

Category: Science › Communication

Meaning: Having meaning or importance.

Part of speech: adjective

Example: The study showed a significant improvement in results.

Category: Science › Statistics

Synonyms:

• important
• notable

Antonyms: insignificant

Meaning: A digit in a number that contributes to its precision.

Part of speech: noun

Example: In the number 0.00456, the significant figures are 4, 5, and 6.

Category: Science › Mathematics

Synonyms: significant digit

Meaning: In a way that is important or meaningful.

Part of speech: adverb

Example: The results changed significantly after the experiment.

Category: Science › Statistics

Synonyms:

• considerably
• notably

Meaning: A hard, unreactive compound found in sand and quartz.

Part of speech: noun

Example: Silica is used in the production of glass.

Category: Science › Chemistry

Synonyms: silicon dioxide

Meaning: A granular, porous form of silica used as a desiccant to control humidity.

Part of speech: noun

Example: Silica gel packets are often found in shoe boxes to keep them dry.

Category: Science › Chemistry

Synonyms: desiccant

Meaning: A compound containing silicon, oxygen, and one or more metals.

Part of speech: noun

Example: Silicates are the most abundant minerals in the Earth's crust.

Category: Science › Geology

Synonyms: silicate mineral

Meaning: A chemical element used in electronics and computer chips.

Part of speech: noun

Example: Silicon is essential for making semiconductors.

Category: Science › Chemistry

Synonyms: Si

Meaning: A synthetic material used in various products, including sealants and medical devices.

Part of speech: noun

Example: Silicone is often used in kitchenware because it is heat resistant.

Category: Science › Chemistry

Synonyms: silicone rubber

Meaning: Relating to or resembling monkeys or apes.

Part of speech: adjective

Example: The simian features of the statue were striking.

Category: Science › Biology

Synonyms: primate

Meaning: A unit of weight equal to 1,000 kilograms; also known as a metric ton.

Part of speech: noun

Example: The shipment weighed five simple tons.

Category: Science › Measurement

Synonyms: metric ton

Meaning: A tube used to move liquid from one container to another using gravity.

Part of speech: noun

Example: He used a siphon to transfer the water from the tank.

Category: Science › Fluid Mechanics

Synonyms: tube

Meaning: The dimensions or magnitude of something.

Part of speech: noun

Example: What size shoes do you wear?

Category: Science › Measurements

Synonyms: dimension

Meaning: The framework of bones that supports the body of a person or animal.

Part of speech: noun

Example: The archaeologists discovered a skeleton buried in the ground.

Synonyms:

• framework
• structure

Antonyms:

• flesh
• body

Meaning: To change or distort something from its true or natural position.

Part of speech: verb

Example: The data was skewed by outliers.

Category: Science › Statistics

Synonyms:

• tilt
• warp

Antonyms:

• straighten
• align

Meaning: A deviation from the expected or normal.

Part of speech: noun

Example: There was a skew whiff in the results of the experiment.

Category: Science › Statistics

Synonyms:

• anomaly
• irregularity

Meaning: Not straight or level; distorted.

Part of speech: adjective

Example: The picture was skewed on the wall.

Category: Science › Geometry

Synonyms:

• tilted
• warped

Antonyms:

• straight
• even

Meaning: The waste material left after the extraction of metal from ore.

Part of speech: noun

Example: The factory produced a lot of slag.

Category: Science › Metallurgy

Synonyms:

• waste
• residue

Meaning: A pile of waste material from mining or metal production.

Part of speech: noun

Example: The slag heap was a remnant of the old mine.

Category: Science › Mining

Synonyms:

• waste pile
• refuse heap

Meaning: A white powder used in construction and agriculture.

Part of speech: noun

Example: Slaked lime is used to improve soil quality.

Category: Science › Chemistry

Synonyms:

• calcium hydroxide
• hydrated lime

Meaning: A tool used for mathematical calculations, consisting of a ruler with a sliding central strip.

Part of speech: noun

Example: He used a slide rule to calculate the results.

Category: Science › Mathematics

Synonyms: calculating tool

Meaning: a mixture of liquid and solid substances

Part of speech: noun

Example: The construction site was covered in a slurry of cement.

Category: Science

Synonyms:

• mixture
• blend

Meaning: To extract metal from its ore by heating.

Part of speech: verb

Example: They smelt iron to make tools.

Category: Science › Chemistry

Synonyms:

• refine
• extract

Meaning: The study of society and social relationships.

Part of speech: noun

Example: Social science includes disciplines like sociology and anthropology.

Category: Science › Social Sciences

Synonyms: sociology

Meaning: A researcher who studies human behavior and social structures.

Part of speech: noun

Example: The social scientist conducted surveys to gather data.

Category: Science › Social Sciences

Synonyms: sociologist

Meaning: A mixture of sodium hydroxide and calcium oxide used in various applications.

Part of speech: noun

Example: Soda lime is often used in chemical processes.

Category: Science › Chemistry

Meaning: A chemical element with the symbol Na, essential for life.

Part of speech: noun

Example: Sodium is important for maintaining fluid balance in the body.

Category: Science › Chemistry

Synonyms: Na

Meaning: A chemical compound used in baking and as an antacid.

Part of speech: noun

Example: Sodium bicarbonate is commonly known as baking soda.

Category: Science › Chemistry

Synonyms:

• baking soda
• bicarbonate of soda

Meaning: A chemical compound commonly known as table salt.

Part of speech: noun

Example: Sodium chloride is used to season food.

Category: Science › Chemistry

Synonyms:

• table salt
• salt

Meaning: The study of soil as a natural resource.

Part of speech: noun

Example: Soil science is important for agriculture and environmental management.

Category: Science › Agriculture

Synonyms: soil science

Meaning: The sun, especially in a scientific context.

Part of speech: noun

Example: The planet closest to sol is Mercury.

Category: Science › Astronomy

Synonyms: sun