Definition: Relating to the time before written history, often referring to ancient times when early humans lived and developed.

Example: The museum has a fascinating exhibit on prehistoric animals and their habitats.

Definition: Relating to a group of extinct primates that are considered to be ancestors of modern humans.

Example: The study of prehominid fossils helps scientists understand human evolution.

Definition: A type of extinct primate that is considered to be a direct ancestor of modern humans and their relatives.

Example: Scientists discovered fossils of a prehominid that lived millions of years ago.

Definition: Relating to a time before modern humans existed or to species that existed before humans.

Example: The fossils found in the cave are from prehuman ancestors.

Definition: The process where fuel ignites in an engine before the spark plug fires, often due to excessive heat or pressure.

Example: Preignition can cause engine knocking and damage if not addressed.

Definition: Relating to the stage before an embryo attaches to the uterus.

Example: The preimplantation stage is crucial for the success of in vitro fertilization.

Definition: Relating to a time or society before the development of industries and factories.

Example: Many preindustrial societies relied on agriculture and craftsmanship for their economy.

Definition: To set a limit on something that has already been established or defined.

Example: The new regulations will prelimit the amount of waste that can be produced by factories.

Definition: Referring to a condition that has the potential to develop into cancer but is not yet cancerous.

Example: The doctor explained that the biopsy showed premalignant cells, which could lead to cancer if not monitored.

Definition: Happening or existing before the usual or expected time, often used to describe something that occurs too early.

Example: The baby was born premature and needed special care.

Definition: The state of being born before the normal time, especially referring to babies who are born too early.

Example: The doctors monitored the baby closely due to his prematurity.