Definition: A very dangerous chemical used to kill insects, which is a yellowish liquid and can be harmful to humans and animals.

Example: Farmers used parathion to protect their crops from pests, but it is now banned in many countries due to its toxicity.

Definition: Referring to lenses that are designed so that when one lens is in focus, other lenses will also be in focus at the same distance.

Example: The microscope is equipped with parfocal lenses, allowing for easy switching between magnifications without losing focus.

Definition: The state or quality of lenses being able to maintain focus when switching between different magnifications.

Example: The parfocality of the microscope allows for easy transitions between objectives without needing to refocus.

Definition: A type of mixture, like plaster, used to cover and protect walls, often for decoration or waterproofing.

Example: The old house was covered in a beautiful parget that added character to its exterior.

Definition: To cover a surface with a layer of plaster or similar material, often for decoration or protection.

Example: The craftsmen decided to parget the walls of the old building to restore its original beauty.

Definition: A type of decorative plaster that is applied to the outside of buildings to enhance their appearance.

Example: The old house was beautifully adorned with intricate pargeting on its exterior walls.

Definition: A type of decorative plastering applied to walls, often used for aesthetic purposes in buildings.

Example: The old house was beautifully adorned with pargetting, showcasing intricate designs on its exterior.

Definition: A type of reproduction where an egg develops into a new organism without being fertilized, often seen in some insects and lower plants.

Example: Some species of bees reproduce through parthenogenesis, allowing them to create new individuals without mating.

Definition: Relating to a type of reproduction where an organism develops from an unfertilized egg, without the need for fertilization by a male.

Example: Some species of lizards can reproduce in a parthenogenetic manner, giving birth to offspring without mating.

Definition: Relating to a type of reproduction where an egg develops into an organism without fertilization by a male.

Example: Some species of lizards are known to reproduce in a parthenogenic manner, producing offspring without mating.

Definition: A very small piece or amount of something, often too small to be seen easily.

Example: The scientist studied the behavior of tiny particles in the air.