Definition of lacustrine
: of, relating to, formed in, living in, or growing in lakes <lacustrine deposits> <lacustrine faunas>
Origin and Etymology of lacustrine
French or Italian lacustre, from Latin lacus lake
First Known Use: 1830
Seen and Heard
What made you want to look up lacustrine? Please tell us where you read or heard it (including the quote, if possible).