Hr factor

noun

ˈā-ˈchär-

: a substance present in Rh-negative blood and apparently reciprocally related to the Rh factor

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Hr factor

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“Hr factor.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Hr%20factor. Accessed 1 Mar. 2025.

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