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tracheo-
tracheobronchial
tracheoesophageal
tracheole
tracheophyte
tracheoscopy
tracheostomy
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tracing
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trace fossil
trace fos·sil (plural trace fos·sils)


noun 
Definition:
 
fossil trace of something: a feature in sedimentary rocks that resulted from the activity of an animal, e.g. a worm cast or footprint
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