Treated as plural. Extremely rare books, manuscripts, or prints.
Origin
Late 19th century; earliest use found in The Academy: a monthly record of literature, learning, science, and art. From classical Latin rārissima, neuter plural of rārissimus, superlative of rārus.
Definition of rarissima in US English:
rarissima
noun
Treated as plural. Extremely rare books, manuscripts, or prints.
Origin
Late 19th century; earliest use found in The Academy: a monthly record of literature, learning, science, and art. From classical Latin rārissima, neuter plural of rārissimus, superlative of rārus.