"The Academy," as a place where arts and sciences were taught, 1580s, from phrase groves of Academe (translating Horace's silvas Academi), the name of the public gymnasium and gardens near Athens where Plato taught, from Greek he Akademeia (see academy).
Latin academia also was used in reference to Plato's doctrines. Academe in a modern, general sense of "the world of universities and scholarship" is attested in English from 1849. (academia in the sense of "academic community" is from 1956.)
Academe properly means Academus (a Greek hero); & its use as a poetic variant for academy, though sanctioned by Shakespeare, Tennyson & Lowell, is a mistake; the grove of A., however, (Milton) means rightly The Academy. [Fowler]
"mark on the hull of a British ship showing how deeply she may be loaded," 1876 (Plimsoll's mark), from Samuel Plimsoll (1824-1898), M.P. for Derby and advocate of shipping reforms (which were embodied in the Merchant Shipping Act of 1876 and required the load-line mark).
The sense was extended by 1907 to rubber-soled canvas shoe (equivalent of American English sneakers) because the band around the shoes that holds the two parts together reminded people of a ship's Plimsoll line; this sense perhaps also was reinforced by sound association with sole (n.1), which sometimes influenced the spelling to plimsole. The surname is of Huguenot origin.
in ancient Roman mythology, one of the three chief divinities (with Jupiter and Juno), a virgin goddess of arts, crafts, and sciences; wisdom, sense, and reflection (later identified with Greek Athene), late 14c., Mynerfe, minerve, from Latin Minerva, from Old Latin Menerva, from Proto-Italic *menes-wo- "intelligent, understanding," from PIE root *men- (1) "to think, remember," with derivatives referring to qualities of mind or states of thought (see mind (n.)). Compare Sanskrit Manasvini, name of the mother of the Moon, manasvin "full of mind or sense." Related: Minerval.
Minerva Press, a printing-press formerly in Leadenhall Street, London; also a class of ultra-sentimental novels, remarkable for their intricate plots, published from about 1790 to 1810 at this press, and other productions of similar character. [Century Dictionary]