The story
From Neptune (the Roman sea god, because it grows in the sea) + grass (from seagrass).
Etymology from Wiktionary, CC BY-SA 4.0.
Neptune grass
Today it means: Posidonia oceanica, a seagrass native to the Mediterranean. Full definition →
Today it means: Posidonia oceanica, a seagrass native to the Mediterranean. Full definition →
From Neptune (the Roman sea god, because it grows in the sea) + grass (from seagrass).
Etymology from Wiktionary, CC BY-SA 4.0.