(topology) A regular space with the additional property that for every disjoint pair of closed sets in that space, there is a disjoint pair of open sets which contain the closed sets, respectively.

Alternative spelling of Spanish omelette

(dated) spark plug

(linear algebra, mathematical analysis) A vector space over the field of real numbers.

(chemistry) A type of three-dimensional molecular model, where the atoms are represented by spheres whose radii are proportional to the radii of the atoms, and whose center-to-center distances are proportional to the distances between the atomic nuclei, all in the same scale.

(computing) The on-board RAM set aside specifically for kernel-related tasks.

plural of Spanish omelette

A molded omelette made with the addition of fried potatoes and often onions.

(historical) The territory of Western Sahara

plural of spaghetti squash