Nut (fruit) usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pecans, pistachios, walnuts, and Brazil nuts, are not nuts in a botanical sense. Common usage of the term often refers to any hard-walled, edible kernel as a nut. A nut in botany is a simple dry fruit in which the ovary wall becomes increasingly hard as it matures, and where the seed remains unattached or free within the ovary wall. Most nuts come from the pistils with "inferior" ovaries (see flower) and all are "indehiscent" (not opening at maturity). True nuts are produced,
Nut (goddess) of Nekek-ur. It flourisheth, and I flourish; it liveth, and I live; it snuffeth the air, and I snuff the air, I the Osiris Ani, whose word is truth, in peace.<nowiki>"</nowiki> "The Book of Nut" is a modern title of what was known in ancient times as "The Fundamentals of the Course of the Stars". This is an important collection of ancient Egyptian astronomical texts, perhaps the earliest of several other such texts, going back at least to 2,000 BC. Nut, being the sky goddess, plays the big role in the "Book of Nut". The text also tells about various