Definition: Referring to a wavelength of light that is longer than that of red light, typically not visible to the human eye.

Example: The ultrared light emitted by the device is used for night vision.

Definition: Relating to the very small structures within a cell that can only be seen with an electron microscope.

Example: The ultrastructural analysis revealed details about the cell's organelles.

Definition: The very small and detailed structure of a biological specimen, like a cell or tissue, that can only be seen with special tools like electron microscopes.

Example: Scientists studied the ultrastructure of the cell to understand its functions better.

Definition: A type of mineral that contains copper and selenium, typically appearing in colors ranging from blue to red.

Example: Umangite is often found in mineral collections due to its unique color and composition.

Definition: A small raised area or projection on a surface, often found in anatomy or biology, such as on the eardrum or a bivalve shell.

Example: The umbo of the eardrum can be seen during a medical examination.

Definition: Relating to a rounded or protruding part, often used in a biological context.

Example: The umbonic structure of the shell was fascinating to the researchers.

Definition: Something that is pure and not mixed with anything else, often used to describe feelings or qualities that are complete and unqualified.

Example: Her unalloyed joy was evident when she received the good news.

Definition: To release or lift an anchor from a vessel, allowing it to move freely.

Example: The captain decided to unanchor the ship to continue its journey.

Definition: Describing something that does not have an arch shape or structure.

Example: The bridge was designed to be unarched for a more modern look.

Definition: Not protected by armor or defensive covering.

Example: The unarmored soldiers were more vulnerable during the battle.