This is an Italian term which literally means 'light-dark'. In paintings the description refers to clear tonal contrasts which are often used to suggest the volume and modelling of the subjects depicted. Artists who are famed for the use of chiaroscuro include Leonardo da Vinci and Caravaggio.
nationalgallery.org.uk/paintings/glossary/chiaroscuro

Scavenger Hunt 37Scav2024 Style of Old Master
Second year Scavenger Hunt
www.ipernity.com/group/2445860/discuss/197768