Keyword Analysis & Research: what is the plus sign called

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what is the plus sign called	1.55	0.9	6510	77	28
what	1.12	0.2	5836	96	4
is	1.62	0.3	6783	66	2
the	1.52	0.3	9829	58	3
plus	0.11	1	5909	65	4
sign	1.57	0.3	3096	32	4
called	0.16	0.4	7070	90	6

Keyword	CPC	PCC	Volume	Score
what is the plus sign called	0.21	0.4	3641	89