What is the meaning of Brady?

Bradycardia.

Bradypnoea.

To have or experience an abnormally low heartbeat, defined as under 60 beats per minute for an adult; to have or experience bradycardia

inflection of brada:

  1. genitive singular
  2. nominative/accusative/vocative plural

genitive singular

nominative/accusative/vocative plural

Source: wiktionary.org