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1 definition by
Aegerine
Yay
A unit of length commonly applied in the study of
caldera
volcanoes
. Approximated by 1/2 an
arm span
of a tall university professor.
The
pyroclastic
fall
deposit
here is about yay thick *holds
arms out
to show size*.
by
Aegerine
October 8, 2014
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Get the
Yay
mug.