(Britain, somewhat dated) a type of school, for pupils who had failed the 11-plus examination, that concentrated on practical and vocational rather than academic subjects

(of goods) Not new; previously owned and used by another. / (of a dealer) Dealing in such merchandise. / (figuratively) Indirect; from a secondary source; not firsthand.

In a used or previously-owned condition. / indirectly

(chemistry) in a coordination compound, the number of ions or molecules that are coordinated to the central metal ion; its coordination number

(biochemistry) The general three-dimensional structure of a biopolymer such as DNA or a protein.

(chemistry) An amine containing two radicals, of general formula R₁R₂-NH; the radicals may be the same, different, or part of a ring.

Hypothermia caused by an underlying pathology that prevents the body from generating enough core heat.

(education, Britain, Ireland) In the UK and Ireland, a state school attended between the ages of 11 and 16 or 18.

(chemistry) any compound of general formula R₂P-H

plural of secondo