Definition: A term used in botany to describe a leaf shape that is wider above the middle and narrows towards the base, resembling an inverted lance shape.

Example: The plant's oblanceolate leaves provide a unique appearance in the garden.

Definition: In a way that is required or necessary; something that must be done or followed.

Example: Some species of plants grow obligately in wet environments, meaning they need water to survive.

Definition: A state of being slanted or not straight, often referring to a deviation from a straight line or direction. It can also mean a lack of straightforwardness in behavior or expression.

Example: The obliquity of the building's design made it stand out in the city skyline.

Definition: Shaped like an egg but with the wider end at the top and the narrower end at the bottom.

Example: The plant has obovate leaves that are easy to identify.

Definition: Shaped like an egg, with the wider part at the top and the narrower part at the bottom.

Example: The obovoid fruit hung from the tree, glistening in the sunlight.

Definition: The condition in which something is hidden or not clearly seen.

Example: The obscuration of the stars made it difficult to see the night sky.

Definition: Something that can be seen or noticed; it is noticeable or worthy of attention.

Example: The changes in the weather were observable over the course of the week.

Definition: A characteristic or quality that can be seen or measured directly.

Example: The observable of the experiment was the change in temperature over time.

Definition: A place or building that is used to observe things like stars, weather, or other natural events.

Example: The scientists gathered at the observatory to study the stars and planets.

Definition: A type of dark, shiny glass that is formed from cooled lava and is often used for making tools and jewelry.

Example: The ancient people used obsidian to create sharp tools and weapons.

Definition: Describing a condition where two opposite leaves or petals overlap each other, often seen in botany.

Example: The obvolute arrangement of the leaves allowed for better sunlight exposure.