| 单词 | rocky head |
| 释义 | > as lemmasrocky head 4. Brewing. Designating a head (head n.1 20a) formed on the top of beer during fermentation that has a solid, rock-like appearance. Later also (in extended use): designating a dense, solid head on a glass of beer. Chiefly in rocky head. [Perhaps compare French rocher foamy head on top of fermenting beer (1765), spec. sense of rocher rock (see rocher n.).] ΘΚΠ the world > food and drink > drink > manufacture of alcoholic drink > brewing > [adjective] > froth unsubsided1804 rocky1835 1835 W. Black Pract. Treat. Brewing 52 The third change is the cauliflower or curling top, rising to a fine rocky or light yeasty head. 1836 Penny Cycl. V. 405/1 The stages of a healthy fermentation are, first, a creamy scum rising on the surface: this, after a time, begins to curl and becomes frosted in appearance; it then becomes rocky, and the air vesicles which appeared frosted enlarge. 1910 Encycl. Brit. IV. 510/2 At the end of a further short period this develops into a light curly mass (cauliflower or curly head), which becomes lighter and more solid in appearance, and is then known as rocky head. 1988 Boston Globe (Nexis) 1 Dec. 14 Golden yellow and cloudy with a small but rocky head. 2001 J. J. Palmer How to Brew vi. 74 Produces a dense rocky head during fermentation. < as lemmas |
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