trimestrialadj.n.
/trʌɪˈmɛstrɪəl/ A. adj.
Consisting of or containing three months; occurring or appearing every three months.
ΘΚΠ
the world > time > period > year > [adjective] > occurring specific number of times a year
quarterly1563
trimestrial1693
semestrial1701
semi-annual1794
three-monthly1819
trimestral1824
bi-monthly1846
trimonthly1856
biannual1870
triannual1901
the world > time > period > a month or calendar month > [adjective] > lasting or occurring every specific number of months
trimestre1623
half-yearly1660
trimestrial1693
two-monthly1811
trimestral1824
decimestrial1842
bimestrial1846
trimonthly1856
bi-monthly1879
trimensual1891
semestrial1894
1693 J. Beaumont Considerations Theory of Earth ii. 96 By others it's made Trimestrial, and by others to consist of Six Months.
1855 Tait's Edinb. Mag. 22 630 The complaint of a trimestrial contemporary.
1865 A. Maffei Brigand Life I. 81 He levied a regular trimestrial tax upon all cattle-dealers.
B. n.
A quarterly publication.
ΘΚΠ
society > communication > journalism > journal > periodical > [noun] > by frequency of publication
quarterly1818
trimestrial1824
anniversary1827
monthly1830
tri-weekly1832
hebdomadal1835
fortnightly1865
three-monthly1886
bi-weekly1890
seasonal1895
bi-monthly1926
1824 T. Medwin Conv. with Byron I. 171 People who read nothing but these trimestrials.
Derivatives
Also (less correctly)
triˈmestral adj.
ΘΚΠ
the world > time > period > year > [adjective] > occurring specific number of times a year
quarterly1563
trimestrial1693
semestrial1701
semi-annual1794
three-monthly1819
trimestral1824
bi-monthly1846
trimonthly1856
biannual1870
triannual1901
the world > time > period > a month or calendar month > [adjective] > lasting or occurring every specific number of months
trimestre1623
half-yearly1660
trimestrial1693
two-monthly1811
trimestral1824
decimestrial1842
bimestrial1846
trimonthly1856
bi-monthly1879
trimensual1891
semestrial1894
1824 Bp. Blomfield in Mem. (1863) I. iv. 101 I have been busier for the last three months than ever I was before for any trimestral portion of my life.
1829 T. P. Thompson in Westm. Rev. Jan. 238 The fiend is up again and doing, till Vishnu array himself in trimestral or monthly incarnation, to return him to his deep.
1881 E. Lynn Linton My Love xii Their trimestral visit..had to be paid.
This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2018).
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adj.n.1693