01 a. Having a tail like that of a swallow; hence, like a swallow's tail in form; having narrow and tapering or pointed skirts; as, a swallow-tai…
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1.
Having a tail like that of a swallow; hence, like a swallow's tail in form; having narrow and tapering or pointed skirts; as, a swallow-tailed coat.
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2.
United by dovetailing; dovetailed.(Carp.)
Phrases & compounds
Swallow-tailed duck —
the old squaw.
Swallow-tailed gull —
an Arctic gull (Xema furcata), which has a deeply forked tail.
Swallow-tailed hawk —
the fork-tailed kite.
Swallow-tailed moth —
a European moth (Urapteryx sambucaria) having tail-like lobes on the hind wings.