Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "perigeum" in a sentence
"As to the Fire Balls, after giving three hypotheses, the author believes in a fourth, that they are terrestrial comets, which, becoming visible to us when in their perigeum, and, electrified passing through the atmosphere, discharge their electricity with an explosion that rends off part of their mass, and pass on."