name of the letter M, c. 1200, from Latin; the Greek name was mu. In printing, originally the square corresponding in dimensions to the capital M of that type.

"assembly, council in a Middle Eastern land" (later, especially, with capital M-, the Persian national assembly), 1821, from Arabic majlis "assembly," literally "session," from jalasa "he sat down."

capital of Slovakia, a Slavic settlement named for its founder or chief; the name is the same element in the first half of the German name for the city, Pressburg (9c.).

common conjoined prefix in Scottish and Irish names, from Old Celtic *makko-s "son." Cognate *makwos "son" produced Old Welsh map, Welsh mab, ap "son;" also probably cognate with Old English mago "son, attendant, servant," Old Norse mögr "son," Gothic magus "boy, servant," Old English mægð "maid" (see maiden).

Formerly often abbreviated to M' and followed by a capital letter, or spelled out Mac and then rarely used with a capital; as, M'Donald, Macdonald, McDonald.

directory listing names and headshots, by 1983, originally among U.S. college students, from face (n.) + book (n.). The social networking Web site of that name (with capital F-) dates from 2004.

"papal envoy, permanent diplomatic agent representing the Pope at a national capital," 1520s, from older Italian nuncio (now nunzio), from Latin nuntius "messenger," from PIE root *neu- "to shout."

Peruvian capital, founded 1535 by Pizarro, from Spanish corruption of Quechua (Inca) Rimak, name of a god and his temple, from rima "to speak" (perhaps a reference to priests who spoke from concealed places in statues of the gods).

c. 1300, "head, leader, captain; the principal or most important part of anything;" from Old French chief "leader, ruler, head" of something, "capital city" (10c., Modern French chef), from Vulgar Latin *capum, from Latin caput "head," also "leader, chief person; summit; capital city" (from PIE root *kaput- "head").

The meaning "head of a clan" is attested from 1570s; it was later extended to headmen of Native American tribes (by 1713; William Penn, 1680s, called them kings). Commander-in-chief is attested from 1660s.

capital of the Czech Republic, Czech Praha, perhaps from an ancient Slavic word related to Czech pražiti, a term for woodland cleared by burning. Popular etymology is from Czech prah "threshold." Related: Praguean; Praguian.

ancient capital city of Assyria, near Mosul in modern Iraq, from Akkadian (Semitic) Ni-nu-a, which is of uncertain origin but perhaps contains the name of a patron goddess. Related: Ninevite.