(topology) A topological space in which for any two distinct points x and y, there is a pair of disjoint open sets U and V such that x∈U and y∈V.

(letterpress typography) A metal block used to separate words, one third of an em in width. / (typography) In digital text, a character representing a thick space.

(letterpress typography) A metal block used to separate words, one fifth of an em in width. / (typography) In digital text, a character representing a thin space.

(topology) A separable, completely metrizable topological space

plural of Spanish Water Dog

A herding water dog originating in Spain.

(mathematical analysis) a curve whose range contains the entire 2-dimensional unit square (or the 3-dimensional unit cube)

The mainland coast of Spanish America.

A dish of spaghetti with a Bolognese sauce.

A method of determining the general classification of ferrous materials that normally requires taking a piece of metal, usually scrap, to a grinding wheel and observing the sparks emitted.