(statistics) Ellipsis of Student's t test.

Initialism of tongue and groove.

(statistics) Ellipsis of Student's t-test.

A rule with a short perpendicular crosspiece at one end, used by draughtsmen to draw parallel lines.

(immunology) A lymphocyte, from the thymus, that can recognise specific antigens and can activate or deactivate other immune cells.

chloramine when used as an antiseptic

The forehead and nose considered together as a region of the face that can, in some people, produce excess sebum compared to other parts of the face.

spanner barb

A T-bone steak.

(transitive, slang, Canada, US, of a motor vehicle) To collide perpendicularly with the side of another vehicle.