of or relating to the Clamatores, a large group of passerine birds with relatively simple vocal organs and little power of song, as the flycatchers.
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British Dictionary definitions for clamatorial
of or relating to the American flycatchers (family Tyrannidae): See flycatcher (def. 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012