That part of the acting surface of a gear wheel tooth that lies within the pitch line.
Adjective
Maximum. Historically faster than full speed (the most a vessel can sustain without excessive engine wear or risk of damage), now frequently used interchangeably.
From Late Middle English flanc, from Late Old English flanc, from Old French flanc, of Germanic origin, probably Frankish *hlanca, from Proto-Germanic *hlankÅ, from Proto-Germanic *hlankaz, from Proto-Indo-European *kleng-. Akin to Old High German hlanca ("loin"), Middle Low German lanke ("hip joint") (German lenken), Old English hlanc ("loose, slender, flaccid, lank"). More at lank.
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