All-rounder
An all-rounder is a cricketer who regularly performs well at both batting and bowling. Although all bowlers must bat and quite a few batsmen do bowl occasionally, most players are skilled in only one of the two disciplines and are considered specialists. Some wicket-keepers have the skills of a specialist batsman and have been referred to as all-rounders, but the term wicketkeeper-batsman is more commonly applied to them, even if they are substitute wicketkeepers that also bowls.
There is no precise qualification for a player to be considered an all-rounder and use of the term tends to be subjective. The generally accepted criterion is that a "genuine all-rounder" is someone whose batting or bowling skills, considered alone, would be good enough to win him a place in the team for which he plays. Another definition of a "genuine all-rounder" is a player who can through both batting and bowling (though not necessarily both in the same match), consistently "win matches for the team" (i.e., propel his/her team to victory by an outstanding individual performance). By either definition, a genuine all-rounder is quite rare and extremely valuable to a team as he effectively operates as two players.