A person who describes. / (taxonomy) A person who scientifically describes a new taxon.

A surname.

One of a set of items which do not need to be specified; often used in conjunction with the catch phrase yadda yadda yadda.

(complex analysis, differential geometry) A geometric counterpart to Nevanlinna theory that extends the applicability of the concept of covering surface (of a topological space) by defining a cover...