(ornithology) Any flight feather attached to the ulna (forearm) of a bird.

Next in order to the first or primary; of second place in origin, rank, etc. / Originating from a deputy or delegated person or body

(chemistry) any compound of general formula R₂P-H

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

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

(scholarly studies) A written commentary which discusses previously produced original work of another author, especially a notable author.

(physics) A technique used to visualize the three-dimensional structure of solids by employing an energetic ion beam to fragment the atomic or molecular constituents from a surface

(physics) The emission of electrons from the surface of a solid when bombarded with electrons or other charged particles

With lesser importance. / In a secondary manner or degree. / (obsolete) Secondly; in the second place.

(chemistry) Any alcohol of general formula R₂CH-OH