Definition: Describing something that does not happen at regular intervals or does not have a repeating pattern.

Example: The aperiodic signal was difficult to analyze because it lacked a consistent frequency.

Definition: The state of not occurring at regular intervals or not having a predictable pattern.

Example: The aperiodicity of the signal made it difficult to analyze.

Definition: An opening or hole that allows light to pass through, often adjustable in devices like cameras or telescopes.

Example: The photographer adjusted the aperture to let in more light for the perfect shot.

Definition: A type of rock that is very dense and has a uniform texture, with its components being too small to be seen without a microscope.

Example: The geologist studied the aphanite to understand its formation process.

Definition: In a way that relates to the top or highest point of something.

Example: The cells were arranged apically, pointing towards the surface.

Definition: A small part of a spore that connects to the sterigmata at the end of a basidium, often found in fungi.

Example: The apiculus is crucial for the attachment of the spore to the basidium.

Definition: A type of lens designed to eliminate certain optical distortions, ensuring that images are clear and straight.

Example: The photographer used an aplanat to capture sharp images without distortion.

Definition: Relating to optical systems that have been adjusted to eliminate spherical aberration, which is a distortion that occurs when light rays entering a lens do not converge at a single point.

Example: The aplanatic lens design ensures that images are sharp and clear by correcting for spherical aberration.

Definition: Relating to a type of fine-grained granite that is composed mainly of quartz and feldspar.

Example: The geologist studied the aplitic rock formation to understand its composition.

Definition: Describing something that is in an inactive or unbound state, often used in scientific or technical contexts.

Example: The enzyme was found to be in an apo form, indicating it was not bound to its substrate.