Plural of colloquium; multiple formal meetings, conferences, or conversations on specific topics.
From Latin colloquium + English plural -s. English adopted the Latin singular colloquium but created its own plural rather than using the Latin form (colloquiums rather than colloquia or colloququia).
It's fascinating that English gave colloquium an anglicized plural when 'colloquia' is technically more 'correct' from Latin—but language doesn't care about rules, it cares about what speakers actually use. Universities now say both, which means we've created acceptable variation through sheer usage.
Complete word intelligence in one call. Free tier — 50 lookups/day.