(geometry) A three-dimensional vector space over the field of real numbers in which one-dimensional linear subspaces are considered as “points” and two-dimensional linear subspaces are considered as “lines”. Equivalently, a sphere in which pairs of antipodal points are considered as “points” and great circles are considered as “lines”.

A ribbed plate in the jaws of a rock crusher.

The plant Saxifraga stolonifera.

(sports) A player chosen as having made the best contribution to a team during a match, often awarded a small prize.

Phylloscopus neglectus, a species of Old World warbler in the family Phylloscopidae.

To bring into exercise or use.

(billiards) To strike the object ball nearer to its centre than its edge.

(billiards) To strike the object ball near the edge.

A flat magnetic stirrer

(projective geometry) The plane onto which an object is projected in a parallel or perspective projection