# j

## Definitions

### General English

### Construction

- A symbol used to describe the event at the head of an
__activity arrow__ in a __critical path__ method (CPM) schedule.

### Electronics

(written as *J*)

A mathematical __unit__ __equal__ to the __square__ __root__ of -1. That is, *j*^{2} = -1. It is used in complex numbers. *j* is usually used in electronics, while i is usually used in other fields.(written as *J*)

A __high__-__level__ __programming language__ especially suited for mathematical applications.(written as *J*)

__symbol__ for __current density__, or electric current density.

### Slang

- noun a
**joint** (a cigarette containing cannabis). An abbreviation from the jargon of drug users, dating from the mid-1960s.

### Law

- symbol forJustice
(written as *J*)

http://www.dictionarycentral.com/definition/j.html