competent
Definition: (adjective) having the skill and knowledge needed for a particular task; capable
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ter·tial
 (tūr  sh  l)
KEY
ADJECTIVE:
- Of, relating to, or designating the third row of flight feathers on the basal section of a bird's wing.
NOUN:
- A tertial feather.
ETYMOLOGY:
Latin tertius, third ; see
tertiary
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