estral cycle

noun
es·tral cycle | \ˈe-strəl- \

Definition of estral cycle 

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- \
variants: or chiefly British oestral cycle \ˈē-strəl- \

Medical Definition of estral cycle 

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