Definition: A large cloud of gas and dust in space that is starting to develop into a galaxy.

Example: Astronomers study protogalaxies to understand how galaxies form and evolve over time.

Definition: Relating to early forms of humans or human-like beings that existed in the past.

Example: Scientists discovered protohuman fossils that provide insight into our evolutionary history.

Definition: A type of early human or human-like primate that is considered to be a precursor to modern humans.

Example: Scientists study protohumans to understand the evolution of our species.

Definition: A type of language that is believed to be the early form or ancestor of a group of languages.

Example: Linguists study protolanguages to understand how modern languages evolved.

Definition: A small particle found in the center of an atom that has a positive charge and is part of the atom's nucleus.

Example: The proton is essential for the structure of atoms and determines the element's identity.

Definition: To add one or more protons to a molecule, ion, or radical, which changes its chemical properties.

Example: In the reaction, the chemist decided to protonate the compound to enhance its reactivity.

Definition: The process of adding a proton to an atom, molecule, or ion, which usually results in the formation of a positively charged ion.

Example: In chemistry, protonation is essential for many reactions, as it can change the properties of a molecule.

Definition: The green, thread-like structure that forms when spores of certain plants, like mosses and liverworts, begin to grow. This structure eventually develops into the main part of the plant that produces gametes.

Example: After the spores of the moss germinate, they develop into a protonema before growing into mature plants.

Definition: Relating to or made up of protons, which are positively charged particles found in the nucleus of an atom.

Example: The protonic properties of the element determine its behavior in chemical reactions.

Definition: Relating to the ability to sense basic sensations like pain, pressure, heat, or cold without being able to pinpoint the exact source of the sensation.

Example: The protopathic sensations are important for detecting potential harm to the body.

Definition: The initial type of phloem tissue that develops from the procambium, characterized by thin-walled cells and typically found in areas of active growth.

Example: During the early stages of plant development, protophloem plays a crucial role in transporting nutrients.