A perennial stream or perennial river is a stream or river (channel) that has continuous flow in parts of its stream bed all year round during years of normal rainfall. "Perennial" streams are contrasted with "intermittent" streams which normally cease flowing for weeks or months each year, and with "ephemeral" channels that flow only for hours or days following rainfall.

Water polo, or water ball, is a team water sport. The playing team consists of six field players and one goalkeeper. The winner of the game is the team that scores the most goals. Game play involves swimming, treading water (using a sort of kicking motion known as "eggbeater kick"), players passing the ball while being defended by opponents, and scoring by throwing the ball into a net defended by a goalie. "Man-up" (or "power play") situations occur frequently. Water polo, therefore, has strong similarities to the land-based game of team handball.

Plasma is one of the four fundamental states of matter (the others being solid, liquid, and gas). Heating a gas may ionize its molecules or atoms (reducing or increasing the number of electrons in them), thus turning it into a plasma, which contains charged particles: positive ions and negative electrons or ions.

The main function of the Civil Grand Jury is to investigate county, city, and joint - power agencies. This is a significant civil function. The Grand Jury acts in a watchdog capacity by examining carefully and completely the operations of various government agencies with in Los Angeles County. The Civil Grand Jury cannot investigate state or federal agencies, which lie outside their jurisdiction. Part of the investigation of governmental agencies includes the ability to audit operations, accounts, and records of officers and departments within the agency under investigation. The Civil Grand Jury is further charged with investigating individual complaints from citizens. By statute the Grand Jury is required to inquire regarding the conditions and management of all public prisons within the County of Los Angeles.

"In the land of the blind, the one-eyed man is king." - Desiderius Erasmus