Referring to a perspective or view from the context of a fictional world, in contrast to a perspective from the real world.

Having one raised edge or wall surrounding a depression.

A coupling that allows different parts of a machine not in line with each other some freedom of movement at the same time as transmitting rotary motion.

(informal, physics) entropic doom of a universe

plural of univalve

having one valve; typically used to refer to mollusks, notably slugs and snails. / consisting of a single valve or piece, used to refer to a shell.

A univalve mollusk or its shell.

(computing) An international standard for interconnecting personal computer devices using simple plugs and sockets and lightweight cables.

(uncountable) A branch of mathematics dealing with equational classes of algebras, where similar theorems from disparate branches of algebra are unified.

(medicine) A person with blood type O, which lacks antigens and is therefore compatible with all other blood types, allowing them to donate blood to any other person.