(mathematics) A type of measure of central tendency calculated as the reciprocal of the mean of the reciprocals, ie, H=n/1/x_1+1/x_2+⋯+1/x_n

(statistics, probability) A measure of location for a batch, a sample, or a distribution characterizing a value around which are spread the members or the distribution.

plural of mail stop

plural of mass grave

A postgraduate degree usually in a non-science subject. / A person holding such a degree.

A generator that creates electricity using spinning magnets; a dynamo.

A limited-access room in a larger building dedicated to HVAC equipment and other machinery.

Alternative spelling of custom-made

A webpage that lists the contents and shows the structure of a website, to aid in navigation.

(idiomatic, dated, UK, Ireland) An expression of mild surprise.