Med. Presence of less than the normal amount of hair, or similarly fur(noun)
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Use "hypotrichosis" in a sentence
"It was then approved to treat hypotrichosis (a technical term for medical hair loss) and over time has been prescribed to treat what marketers call "inadequate eyelashes.""
"But it did strike me as surprising that Shields would have the condition hypotrichosis, for which the FDA approved the drug."
"Hence, a rebranding as the first FDA approved treatment for sparse or inadequate eyelashes, clinically known as hypotrichosis."