A tool used in machining fields, especially milling, to aid in setup. It is a block of steel that is precisely squared and parallel whose sides are 2, 4, and 6 inches long, respectively. 2-4-6 blocks are a larger version of the more common 1-2-3 block.

plural of omega-6 fatty acid

plural of ω-6 fatty acid

Abbreviation of omega-6 fatty acid.

plural of 4-6-4-4

plural of 4-4-6-4

plural of 6-4-4-6

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, a set of six driving wheels followed by another set of eight driving wheels, and no trailing wheels.

(chemistry) any polyunsaturated fatty acid having a double bond between the sixth and seventh carbon atoms from the end of the molecule farthest from the carboxylic acid; although they are essential fatty acids, there is evidence that excess levels can cause a number of diseases

Under the Whyte notation system, a duplex steam locomotive that has four leading wheels in a leading truck followed by four coupled driving wheels, a second set with six coupled driving wheels, and four trailing wheels in a trailing truck.