estral cycle

noun
es·​tral cycle | \ ˈe-strəl- How to pronounce estral cycle (audio) \

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First Known Use of estral cycle

1941, in the meaning defined above

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The first known use of estral cycle was in 1941

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estral cycle

noun
es·​tral cycle | \ ˈes-trəl- How to pronounce estral cycle (audio) \
variants: or chiefly British oestral cycle \ ˈē-​strəl-​ How to pronounce oestral cycle (audio) \

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