Definition: Describing something that has a covering or lid, often used in biological contexts to refer to structures that can close or cover an opening.

Example: The operculate species of snails have a protective lid that covers their shells when they retract inside.

Definition: Having a cover or lid, often used in reference to certain structures in animals or plants.

Example: The operculated species of snails have a protective lid that closes their shell opening.

Definition: A covering or lid that closes an opening, such as the gill cover in some fish or the shell cover in snails.

Example: The operculum protects the gills of the fish from debris and predators.

Definition: A section of DNA that contains a group of genes that work together to control the production of proteins, including a promoter and an operator.

Example: The operon is essential for regulating gene expression in bacteria.

Definition: Involving a lot of hard work and effort; requiring much labor.

Example: The operose task of building the bridge took several months to complete.

Definition: A type of green rock that is made up of diabase and can also refer to other green rocks like serpentine.

Example: The geologist collected a sample of ophite to study its mineral composition.

Definition: A type of stone referred to by ancient Greek and Latin writers, which can represent several different things.

Example: The ancient texts describe ophites as having unique properties and significance.

Definition: Describing a type of rock texture where flat, lath-shaped crystals of plagioclase are surrounded by pyroxene crystals.

Example: The geologist identified the sample as ophitic due to its unique crystal structure.

Definition: A type of marine animal that belongs to the class Ophiuroidea, commonly known as brittle stars, which have long, flexible arms and a central disc.

Example: The ophiuroid was found hiding among the coral reefs.

Definition: A condition characterized by inflammation of the eye, particularly affecting the conjunctiva or the eyeball.

Example: The doctor diagnosed her with ophthalmia after she complained of redness and irritation in her eyes.