Noun
louisine (uncountable)
(historical) A fine-grained, lightweight, soft-finished silk of microscopic basketweave.
Her friend Louisine Elder married Harry Havemeyer in 1883, and with Cassatt as advisor, the couple began collecting the Impressionists on a grand scale. Source: Internet
This archival collection includes original letters from Mary Cassatt to Louisine and Henry Osborne Havemeyer. Source: Internet