(taxonomy, of a taxon name) That is not ruled by ICZN and is defined by the particular set of members included. / (taxonomy) Of, or related to circumscription.

The act of circumscribing or the quality of being circumscribed. / Anything that circumscribes or a circumscribed area.

Limited, circumscribed.

plural of circumscription

In a circumscriptive manner / With regard to circumscription

That circumscribes or outlines

Capable of being circumscribed or limited by bounds

(mathematics, of a polygon) Having an inscribed circle that is tangent to each side