trillionthadj.n.
/ˈtrɪljənθ/, U.S. /ˈtrɪljənθ/ A. adj.
The ordinal adjective corresponding to ‘trillion’.
ΚΠ
1851 J. Ruskin Sheepfolds 16 The seven-millionth or trillionth of its collective evidence.
B. n.
One part out of a trillion.
ΘΚΠ
the world > relative properties > number > specific numbers > hundred and over > [noun] > division of power of a million
centillionth1815
decillionth1830
octillionth1842
sextillionth1842
trillionth1848
quadrillionth1883
1848 Fraser's Mag. 37 647 The millionth of a grain is a common dose; and a trillionth, octillionth, even a decillionth, very usual ones.
This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022).
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adj.n.1848