Y class

Example Sentences

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Each of these spectral classes, except possibly for the Y class which is still being defined, is further subdivided into 10 subclasses designated by the numbers 0 through 9.

From Textbooks • Oct. 13, 2016

During these years Dr. Studer helped James Naismith invent basketball, hired a young mechanic named Henry Ford for $2 a night to teach a Y class in ironworking.

From Time Magazine Archive