splitter

[RobertFaw]

a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics

[VikaRip]

A person or a thing that splits.

[Nicolasmam]

A scientist in one of various fields who prefers to split categories such as species or dialects up into smaller groups.

[Franceswah]

In baseball, a splitfinger fastball (a type of pitch).

[KalanNug]

A draggable vertical or horizontal bar used to adjust the relative sizes of two adjacent windows.

[Oralee]

A splitter is a device or tool designed to divide or separate a singular flow or signal into multiple outputs. It can be used in various fields such as in technology to distribute data signals, or in physical applications to split materials or substances.

[Malcolmdof]

In plane geometry, a splitter of a triangle is a line segment having one endpoint at one of the three vertices of the triangle and the other at the opposite excircle tangency, thus bisecting the perimeter of the triangle.
The three splitters concur at the Nagel point of the triangle.

[AliceAstes]

A man engaged in the Newfoundland fisheries to receive the
fish from the header, and, with a sharp knife, dexterously to lay it
open.

[MonicaLebi]

one who, or that which, splits

[SergioAnigo]

one who splits or describes species or genera upon minute characters which the Lumper (q.v.) deems insufficient to authorize them.