Definition: Relating to tiny plants that float in water and are a key part of the aquatic food chain.

Example: The phytoplanktonic organisms are essential for the health of marine ecosystems.

Definition: A type of bacteria that lives as a parasite in the phloem tissue of plants and some insects, known for having no cell wall and a very small genome.

Example: Phytoplasma can cause serious diseases in plants, affecting their growth and health.

Definition: A field of study in ecology that focuses on the characteristics, classification, relationships, and distribution of plant communities.

Example: Phytosociology helps scientists understand how different plant species interact within their environments.

Definition: A type of plant-derived compound that resembles cholesterol and is found in various plants. These compounds can help lower cholesterol levels in the body.

Example: Phytosterols are often added to margarine to help reduce cholesterol levels.

Definition: Harmful or toxic to plants, causing damage or death to them.

Example: The chemical was found to be phytotoxic, leading to the wilting of the crops.

Definition: A measure of how harmful a substance is to plants.

Example: The phytotoxicity of the chemical was tested on various crops.

Definition: Not intended to be included in the final version of a document or print.

Example: The pi text in the manuscript was marked for removal before publication.

Definition: To become mixed up or confused in a way that is difficult to understand.

Example: The instructions began to pi, making it hard to follow the steps.

Definition: A special number in mathematics, about 3.14, that shows the relationship between the distance around a circle and the distance across it.

Example: In geometry class, we learned that pi is essential for calculating the area of a circle.

Definition: Relating to the pia mater, which is a delicate membrane covering the brain and spinal cord.

Example: The surgeon carefully navigated the pial layer during the operation.

Definition: A strong desire to eat non-food items, like dirt or paint, or a specific size used in printing and typesetting.

Example: The artist had a pica for clay, often using it in her sculptures.

Definition: Having a glossy black or brownish-black color, often resembling pitch.

Example: The piceous feathers of the bird shimmered in the sunlight.