The Collaborative International Dictionary
springhalt
Stringhalt \String"halt`\, n. (Far.) An habitual sudden twitching of the hinder leg of a horse, or an involuntary or convulsive contraction of the muscles that raise the hock. [Written also springhalt.]
Wiktionary
springhalt
alt. (context obsolete English) A kind of lameness in horses. n. (context obsolete English) A kind of lameness in horses.