SINCE 1828
tertial
adjective
ter·tial
| \ ˈtərshəl\
Definition of tertial
(Entry 1 of 2)
1
: of, relating to, or constituting the flight feathers borne on the basal joint of a bird's wing — compare primary sense 2c
2
: of, relating to, or constituting some of the innermost secondaries when different from the others or the scapular feathers
—not used technically
tertial
noun
\ "\
plural -s
Definition of tertial (Entry 2 of 2)
: a tertial feather
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