presymptomatically en · ADV
Etymology
From presymptomatic + -ally.
Meanings
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(not-comparable) Before the appearance of symptoms.
One was diagnosed presymptomatically because his brother, whose onset was at 13 months, had the disease […]
2005, William L. Nyhan, Bruce A. Barshop, Pinar T. Ozand, Atlas of Metabolic Diseases: Second Edition, page 10: