Any drug that suppresses premature labour—premature giving birth.(noun)
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Use "tocolytic" in a sentence
"You receive an injection of a tocolytic drug such as terbutaline, which relaxes your uterus."
"If your doctor suggests that you take a tocolytic drug for several weeks, discuss the plan in detail."
"Fortunately due to the miracles of modern science magnesium sulfate; breathine; home tocolytic services; etc. they were able to stop her repeated attempts to be born extremely early."