Is lance a word in the Scrabble Dictionary

Yes, lance is playable

...and is worth 10 points.

Found in the following dictionaries

Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Lance" Definition

noun

A cavalry lancer.
A similar implement for spearing fish.
A thrusting weapon with a long wooden shaft and a sharp metal head.
Medicine See lancet.
A steel-tipped spear carried by mounted knights or light cavalry.

verb-transitive

Medicine To make a surgical incision in; cut into: lance a boil.
To pierce with a lance.

verb

To pierce with or as if with a lance.
To open with or as if with a .
To throw forward .
To move forward quickly.