noun (used with a singular verb) Pathology.
an infectious, nonvenereal tropical disease, primarily of children, characterized by raspberrylike eruptions of the skin and caused by a spirochete, Treponema pertenue, that is closely related to the agent of syphilis.
Also called frambesia, pian.
Compare mother yaw.

1670–80; < Carib; see -s3

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1 [yaw]
verb (used without object)
to deviate temporarily from a straight course, as a ship.
(of an aircraft) to have a motion about its vertical axis.
(of a rocket or guided missile) to deviate from a stable flight attitude by oscillation of the longitudinal axis in the horizontal plane.
verb (used with object)
to cause to yaw.
a movement of deviation from a direct course, as of a ship.
a motion of an aircraft about its vertical axis.
an angle, to the right or left, determined by the direction of motion of an aircraft or spacecraft and its vertical and longitudinal plane of symmetry.
the act of yawing.
the angular displacement of the longitudinal axis due to yawing.

1540–50; origin uncertain


2 [yaw]
noun Pathology.
one of the lesions of yaws.

1735–45; back formation from yaws

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
yaw (jɔː)
1.  (intr) pitch Compare roll (of an aircraft, missile, etc) to turn about its vertical axis
2.  (intr) (of a ship, etc) to deviate temporarily from a straight course
3.  (tr) to cause (an aircraft, ship, etc) to yaw
4.  the angular movement of an aircraft, missile, etc, about its vertical axis
5.  the deviation of a vessel from a straight course
[C16: of unknown origin]

yaws (jɔːz)
(usually functioning as singular) Also called: framboesia an infectious nonvenereal disease of tropical climates with early symptoms resembling syphilis, characterized by red skin eruptions and, later, pain in the joints: it is caused by the spiral bacterium Treponema pertenue
[C17: of Carib origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

"to fall away from the line of a course," 1546, from O.N. jaga, O.Dan. jæge "to drive, chase," from M.L.G. jagen (see yacht).

1679, from Carib yaya, the native name for the disease.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

yaws (yôz)
An infectious tropical disease caused by Treponema pertenue, characterized by the development of crusted granulomatous ulcers on the extremities that may cause bone and joint destruction in later stages of the disease. Also called boubas, bubas, frambesia, granuloma tropicum, pian, rupia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
yaws   (yôz)  Pronunciation Key 
A highly contagious tropical disease that chiefly affects children, caused by the spirochete Treponema pertenue and characterized by raspberrylike sores, especially on the hands, feet, and face.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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