(Australia, New Zealand) The work of a wool classer, sorting and assigning grades to wool according to its quality.

(anatomy) The cavity of the mouth, especially the part of the mouth behind the gums and teeth that is bounded above by the hard and soft palates and below by the tongue and by the mucous membrane c...

Obsolete spelling of prolific

(chemistry) A chemical engineering process in which hydrotreating is used to reduce the nitrogen content of hydrocarbons during oil refining