triˈmonthly, a.
[tri- 3.]
a. Occurring every three months. b. Lasting or extending over three months.
| 1856 Trans. Mich. Agric. Soc. VII. 329 The Steamer Superior..made tri-monthly trips from Buffalo to Detroit. 1869 J. D. Burns Mem. & Rem. vi. 104 Our trimonthly Communion. 1870 Cornh. Mag. July 66 The trimonthly homes of country squires. 1879 Daily News 1 Dec. 6/5 Annual as opposed to bi-monthly or tri-monthly budgets. |