Casey Schwartz on the science behind the rare affliction—and how it spreads.
H7N9 is lethal and spreads faster than any other identified strain of bird flu.
They post their work on YouTube, and it spreads globally via social media and the international press.
c.1200, "to stretch out, to send in various directions," probably from Old English -sprædan (especially in tosprædan "to spread out," and gesprædung "spreading"), from Proto-Germanic *spraidijanan (cf. Danish sprede, Old Swedish spreda, Middle Dutch spreiden, Old High German and German spreiten "to spread"), probably from PIE *sper- "to strew" (see sprout (v.)). Reflexive sense of "to extend, expand" is attested from mid-14c.
1690s, "extent or expanse of something," from spread (v.). Meaning "copious meal" dates from 1822; sense of "food for spreading" (butter, jam, etc.) is from 1812. Sense of "bed cover" is recorded from 1848, originally American English. Meaning "degree of variation" is attested from 1929. Meaning "ranch for raising cattle" is attested from 1927.
Old English lecgan "to place on the ground (or other surface)," also "put down (often by striking)," from Proto-Germanic *lagjanan (cf. Old Saxon leggian, Old Norse leggja, Old Frisian ledza, Middle Dutch legghan, Dutch leggen, Old High German lecken, German legen, Gothic lagjan "to lay, put, place"), causative of lie (v.2). As a noun, from 1550s, "act of laying." Meaning "way in which something is laid" (e.g. lay of the land) first recorded 1819.
Meaning "have sex with" first recorded 1934, in U.S. slang, probably from sense of "deposit" (which was in Old English, as in lay an egg, lay a bet, etc.), perhaps reinforced by to lie with, a phrase frequently met in the Bible. The noun meaning "woman available for sexual intercourse" is attested from 1930, but there are suggestions of it in stage puns from as far back as 1767. To lay for (someone) "await a chance at revenge" is from late 15c.; lay low "stay inconspicuous" is from 1839. To lay (someone) low preserves the secondary Old English sense.
"uneducated; non-clerical," early 14c., from Old French lai "secular, not of the clergy" (Modern French laïque), from Late Latin laicus, from Greek laikos "of the people," from laos "people," of unknown origin. In Middle English, contrasted with learned, a sense revived 1810 for "non-expert."
"short song," mid-13c., from Old French lai "song, lyric," of unknown origin, perhaps from Celtic (cf. Irish laid "song, poem," Gaelic laoidh "poem, verse, play") because the earliest verses so called were Arthurian ballads, but OED finds this "out of the question" and prefers a theory which traces it to a Germanic source, cf. Old High German leich "play, melody, song."
The free market in petroleum, outside the price scales set by the producers' organization
[1982+; spot oil is found by 1888]