Where does “palaeolagoon” come from?

palaeolagoon (English) comes from English lagoon, from French lagune, from Italian laguna, from Latin lacūna, from Latin lacus, from New Latin lacrimalis, from Latin lācrima, from Old Latin dacrima — eye bitter.

Ancestry of “palaeolagoon”, step by step

StepLanguageWordMeaning
1EnglishlagoonA shallow body of water separated from deeper sea...
2Frenchlagunelagoon, shallow body of coastal water
3Italianlagunalagoon
4Latinlacūnaa hole, pit, ditch; especially a pool, pond
5Latinlacusa lake, pond, basin; reservoir; a tank, tub, vat,...
6New Latinlacrimalis
7Latinlācrimaa tear drop of liquid from crying
8Old Latindacrimatear
9Proto-Italic*d(r)(k)akrunā
10Proto-Indo-Europeandáḱru-tears; tear
11Proto-Indo-Europeandr̥ḱ-h₂eḱru-eye bitter
Every word from Proto-Indo-European dr̥ḱ-h₂eḱru-Every word from Proto-Indo-European dáḱru-Every word from Proto-Italic *d(r)(k)akrunā