HELIOCENTRICISM

Etymology

Noun

heliocentricism (uncountable)

Alternative form of heliocentrism

Usage notes

This is the form recognized by many dictionaries as grammatically correct. However, in current usage "heliocentrism" appears to be by far more frequently used. According to a Google Books search it seems that "heliocentrism" began to gain ground in the turn of 1960s and 1970s with the first occurrence taking place in 1930s.

Source: Wiktionary

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