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Douglas Harper's Etymology Dictionary
intertidal

1883, from inter- + tidal.

Wiktionary
intertidal

a. Pertaining to the part of a shore between the high water and the low water.

WordNet
intertidal

adj. of or relating to the littoral area above the low-tide mark

Wikipedia

Usage examples of "intertidal".

When the surf came forward, the two Riders were submerged in the turbid chill, surrounded by the coralesks and intertidal creatures that built their little homes here.

The men pass the day eating snails and clams from the intertidal pools.

Pacific squadron the Labouchere, Lady Lampson and PaciJIC, which all foundered on the intertidal rocks of the West Coast.

California, beginning with the seaweed that floated off-shore, working their way through the mussel-beds and crab-flats of the intertidal zone, chewing tunnels into the scrub that clung to the beach-edge and perpetrating massacres of animals and birds.

The intertidal zone and the tidal pools were rich with blue mussels, barnacles, starfish, horseshoe crabs, and sea anemones, living fossils whose history went back hundreds of millions of years, and he had decided Eleanor would enjoy that.

He heard and tasted the weathered gnarls of the rock, and the seaweed and barnacles, periwinkles and limpets, anemones and starfish that inhabited the intertidal zone.

They went up the West Coast, all the way from Carmel to Sitka, Alaska, collecting intertidal fauna.

Spring kelp was visible beneath the surface just beyond the intertidal zone, and then, beyond that, the smooth blue swells of the ocean.

The intertidal sponges grew like violet shadows, crowding together and absorbing the light with their pigments, the same way they absorbed the hardeners they were fed.

To the right a spit of land stuck out like an impudent tongue, dividing the sea from the intertidal waters.

Then she returned to scrounging happily in the sand and occasional patches of sea slime that covered the intertidal zone.

There were intertidal, or lagoon, deposits sitting atop shallow glauconitic marine or shore-face deposits.

The textures of shells and seaweed, smooth waves and slanting light, were what had lured her out beyond the tide pools and slippery intertidal rocks to this spot midway between land and sea.

Fresh water exists, but in these paralic or intertidal zones, it might just as well not.

Normally, when sea levels rise, marine sediments will cover over beach and intertidal or lagoon areas, as the seafloor gradually migrates landward.