uncial adj.

"linear measure, one-twelfth of a foot," late Old English ynce, Middle English unche (current spelling c. 1300), from Latin uncia "a twelfth part," from unus "one" (from PIE root *oi-no- "one, unique"). An early Anglo-Saxon borrowing from Latin; not found in other Germanic languages. Transferred and figurative sense of "a very small amount, small quantity" is attested from mid-14c. As the unit of measure of rainfall from 1845. Sometimes misdivided in Middle English as a neynche. Every inch "in every respect" is from early 15c. For phrase give him an inch ... see ell.

in reference to writing in which the letters are joined and formed rapidly without lifting the pen or pencil, 1784, from French cursif (18c.), from Medieval Latin cursivus "running," from Latin cursus "a running," from past participle of currere "to run" (from PIE root *kers- "to run").

The notion is of "written with a running hand" (without raising the pen), originally as opposed to the older uncial hand. Greek cursive writing is attested from 160 B.C.E. An older name for it was joining-hand (1580s) because the successive letters of each word are joined. As a noun, "cursive letters or writing," by 1850. Related: Cursively.

Proto-Indo-European root meaning "one, unique."

It forms all or part of: a (1) indefinite article; alone; an; Angus; anon; atone; any; eleven; inch (n.1) "linear measure, one-twelfth of a foot;" lone; lonely; non-; none; null; once; one; ounce (n.1) unit of weight; quincunx; triune; unanimous; unary; une; uni-; Uniate; unilateral; uncial; unicorn; union; unique; unison; unite; unity; universal; universe; university; zollverein.

It is the hypothetical source of/evidence for its existence is provided by: Greek oinos "ace (on dice);" Latin unus "one;" Old Persian aivam; Old Church Slavonic -inu, ino-; Lithuanian vienas; Old Irish oin; Breton un "one;" Old English an, German ein, Gothic ains "one."