Exam: TOEFL

Definition: The quality of being easily annoyed or irritable.

Example: Her tetchiness made it difficult for others to approach her with their problems.

Definition: Easily annoyed or irritable, often reacting with impatience or anger.

Example: She became tetchy when her plans were interrupted.

Definition: The act of connecting a device, like a computer, to a mobile phone to use the phone's internet connection.

Example: I used tethering to connect my laptop to my phone's internet while traveling.

Definition: To tie or fasten something to a fixed object to prevent it from moving freely.

Example: The dog was tethering to the post to keep it from running away.

Definition: A chemical substance that has four chlorine atoms in each molecule.

Example: Tetrachloride is often used in industrial applications and chemical synthesis.

Definition: A type of antibiotic that is used to treat various infections and is derived from certain bacteria.

Example: The doctor prescribed tetracycline to help clear up the infection.

Definition: A chemical compound that contains four fluorine atoms in each molecule.

Example: Tetrafluoride is often used in various industrial applications due to its unique properties.

Definition: A three-dimensional shape that has four flat surfaces, which are called faces.

Example: The tetrahedron is one of the simplest forms of a polyhedron.

Definition: Referring to an organism or cell that has four sets of chromosomes instead of the usual two sets.

Example: The tetraploid plant species can produce larger fruits than its diploid relatives.

Definition: An organism or cell that has four complete sets of chromosomes, which is more than the usual two sets found in diploid organisms.

Example: The scientist studied a tetraploid plant to understand its genetic variations.

Definition: Describing an organism that has four limbs or leg-like structures.

Example: The tetrapod animals include frogs, birds, and mammals.

Definition: A type of animal that has four limbs or legs, including creatures like amphibians, birds, and mammals.

Example: Frogs are examples of tetrapods that live both in water and on land.

Definition: A type of chemical compound made up of four connected pyrrole rings, often found in natural pigments like chlorophyll.

Example: Chlorophyll is a tetrapyrrole that plays a crucial role in photosynthesis.