verb (used without object), lu·cu·brat·ed, lu·cu·brat·ing.
1.
to work, write, or study laboriously, especially at night.
2.
to write learnedly.
Origin: 1615–25; < Latinlūcubrātus, past participle of lūcubrāre to work by artificial light, equivalent to lūcu-, variant (before labials) of lūci-, combining form of lūcēre to shine + -br(um) instrumental suffix + -ā- theme vowel + -tus past participle suffix