Definition: The beginning or start of something, often used to describe the initial stage of an event or condition.

Example: The onset of winter brought cold temperatures and snow.

Definition: The development of an individual organism from the earliest stage to maturity, including all the changes it undergoes during its life.

Example: The study of ontogenesis helps scientists understand how organisms grow and develop over time.

Definition: Relating to the development of an individual organism from the earliest stage to maturity.

Example: The ontogenetic changes in the frog are fascinating to study as it grows from a tadpole to an adult.

Definition: The process of development of an individual organism from its earliest stage as an embryo to its mature form.

Example: The study of ontogeny helps scientists understand how organisms grow and develop over time.

Definition: A field of study in philosophy that focuses on the nature of existence and what it means to be. It explores different types of entities and their relationships.

Example: In philosophy classes, we often discuss ontology and its implications for understanding reality.

Definition: A type of wormlike animal that is carnivorous and belongs to the phylum Onychophora. These creatures are found in tropical and temperate forests and share features with both arthropods and annelid worms.

Example: The onychophoran is known for its unique appearance and predatory behavior in the forest ecosystem.

Definition: A type of gemstone that is made of a mineral called chalcedony, which has bands of different colors and is often used in jewelry and decorative items.

Example: The ring was beautifully crafted with a large onyx stone in the center.

Definition: A protective structure where certain types of parasites develop and can be transferred to new hosts.

Example: The oocyst is essential for the life cycle of the parasite, allowing it to survive outside the host.

Definition: A type of cell that develops into an egg in females; it is involved in reproduction.

Example: The oocyte is crucial for the process of fertilization in many animals.

Definition: A type of reproductive cell that is larger than the male gamete, produced by certain organisms for sexual reproduction.

Example: In many plants and animals, the oogamete is the female gamete that combines with the male gamete to form a new organism.