Your word doesn't have any usefulness. It was invented by some crossword enthusiasts in the fifties and is used to describe a specific kind of pneumonia gotten via silica dust after a volcanic eruption, which in itself is exceedingly specific. The term xenoarchaeology (also known as astroarchaeology) is the attempted reconstruction of alien civilizations in order to learn more about them which in itself would benefit the human species more than the longest word in the English language that isn't a molecule (take Titin) would.
