This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Of or relating to lakes.

adj. Living or growing in or along the edges of lakes.

adj. Of or relating to lakes.

Of or pertaining to a lake or to lakes.

Living on or in lakes, as various animals.

In botany, growing in lakes or ponds. Also lacustral and lacustrian.

adj. of or relating to or living near lakes

"Longitudinal studies have revealed a rapid build up of phosphorus in lacustrine sediments."

lacustrine deposits    lacustrine dwelling   

checkable    good-faith    subaqueous    alien-looking    topaline    donors'    artificial-intelligent    brackish-water    sub-himalayan    ormer