Yes, trace is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Trace" Definition
noun
A bar or rod, hinged at either end to another part, that transfers movement from one part of a machine to another.
A barely perceivable indication; a touch: spoke with a trace of sarcasm.
A constituent, such as a chemical compound or element, present in quantities less than a standard limit.
A line drawn by a recording instrument, such as a cardiograph.
A path or trail that has been beaten out by the passage of animals or people.
verb-intransitive
To have origins; be traceable: linguistic features that trace to West Africa.
verb
To form (as letters or figures) carefully or painstakingly.
To copy (as a drawing) by following the lines or letters as seen through a transparent superimposed sheet.
To impress or imprint (as a design or pattern) with a .
To record a of in the form of a curved, wavy, or broken line .
To adorn with linear ornamentation (as or chasing).
adjective
Occurring in extremely small amounts or in quantities less than a standard limit.
verb-transitive
To ascertain the successive stages in the development or progress of: tracing the life cycle of an insect; trace the history of a family.
To copy by following lines seen through a sheet of transparent paper.
To draw (a line or figure); sketch; delineate.
To follow closely (a prescribed pattern): The skater traced a figure eight.
To follow the course or trail of: trace a wounded deer; tracing missing persons.
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