by 1841, backsight of a firearm, from hind (adj.) + sight. Meaning seeing what has happened is attested by 1862, American English, (in proverbial If our foresight was as good as our hindsight, it would be an easy matter to get rich), probably a formation on the model of foresight.
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The larvae settle to the sea floor and adopt their distinctive adult radial symmetry. Sea Stars. Sea stars, also known as âstarfishâ, are probably the most well known echinoderm of the sea. The common name âstarfishâ is quickly being replaced by the more accurate term âsea starâ.Since starfish have no relation to fish, the term âsea starâ is preferable.he most striking feature of all echinoderms is their pentamerous radial symmetry. That is, the body can be divided into five parts (or appendages) which point outward from the center of the body. Interestingly, although most mature echinoderms are radially symmetrical, the larvae usually have bilateral symmetry.