Sesquiannual
adj
adj ·Rare ·Advanced level
Definitions
Adjective
- 1 Occurring once every one and a half years (i.e. once every 18 months). not-comparable
"1979, R. E. Meyer, Sesquiannual Report – April 1977-September 1978, Fossil Energy Division/DOE (DOE/W-7405-eng–26-1; cited in Surface Phenomena in Enhanced Oil Recovery (2013, →ISBN, page 718)"
Example
More examples"1979, R. E. Meyer, Sesquiannual Report – April 1977-September 1978, Fossil Energy Division/DOE (DOE/W-7405-eng–26-1; cited in Surface Phenomena in Enhanced Oil Recovery (2013, →ISBN, page 718)"
Etymology
From sesqui- + annual.
More for "sesquiannual"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.