responder
responder Lexical Profile
responder Game Scores & Validity
• noun
A person who replies to something, or who reacts to an event, situation, or emergency (especially a member of the emergency services).
"Emergency responders arrived at the scene within minutes of the distress call."
In medicine, a patient or organism that shows a favorable physiological reaction to a specific drug, therapy, or stimulus.
"The clinical trial demonstrated a high survival rate among early responders to the new immunotherapy."
An electronic device or software program that automatically receives and transmits a reply to an incoming signal or message.
"Each student used a handheld wireless responder to submit answers during the interactive lecture."
Word Nuance & Usage
While 'respondent' is preferred in legal contexts and formal survey research, 'responder' is standard for emergency personnel (as in 'first responder') and medical patients who react to treatment.