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Webster 1913 Edition

Noun.

A disease in horses and swine, in which the upper part of the throat, or groups of lymphatic glands elsewhere, swells.

Noun.

Swellings in a horses throat.

strangles

strangles ‎(uncountable)

A disease of horses caused by an infection by the bacterium Streptococcus equi.
- 1816, Richard Lawrence, The complete farrier, and British sportsman (page 245)
  The Vives, like the strangles, is most incident to young horses, and usually proceeds from the same causes, such as catching cold, being over-heated, or over-worked, about the time of shedding their teeth.

disease of horses