Definition: The quality of allowing liquids or gases to pass through it.

Example: The perviousness of the soil allows rainwater to seep into the ground.

Definition: Relating to substances that are used to kill pests, especially insects or weeds.

Example: Farmers often use pesticidal sprays to protect their crops from harmful insects.

Definition: A chemical substance that is used to kill unwanted animals or plants, especially insects that harm crops.

Example: Farmers often use pesticide to protect their crops from insects.

Definition: A serious and often deadly disease that spreads quickly and affects many people, especially in the form of an epidemic.

Example: The town was devastated by a pestilence that swept through the population.

Definition: Relating to or causing a deadly disease; harmful or annoying.

Example: The pestilential conditions in the area led to a rapid spread of illness.

Definition: In a manner that causes or relates to disease or plague; harmful or destructive.

Example: The air was pestilentially filled with the stench of decay.

Definition: In a way that causes or relates to disease or harm; destructively or mischievously.

Example: The pests spread the disease pestilently, affecting the entire crop.

Definition: A tiny red or purple spot on the skin or mucous membrane caused by bleeding under the skin.

Example: The doctor noticed several petechiae on the patient's arm during the examination.

Definition: Describing something that is related to or looks like small spots of bleeding under the skin.

Example: The doctor noted the petechial rash on the patient's arm during the examination.

Definition: The process where organic material is replaced by minerals, turning it into stone, or the state of being extremely shocked or unable to move.

Example: The petrifaction of the tree over millions of years created a beautiful fossil.