1. having three rings in the molecular structure
Usage: chemistry
2. relating to or denoting antidepressant drugs with a three-ring molecular structure
Usage: medicine

1. a tricyclic antidepressant drug
Usage: medicine

Examples

• The tricyclic compound showed interesting chemical properties.
• Tricyclic antidepressants were commonly prescribed in the 1970s.
• The doctor explained the side effects of tricyclic medications.
• She was prescribed a tricyclic for her depression.
• The tricyclic structure makes these drugs effective but also causes more side effects.
• Modern antidepressants have largely replaced older tricyclics.