Final answer:
Romantic love, as defined by Sternberg's triangular theory of love, includes passion and intimacy but not commitment, distinguishing it from the companionate love characteristic of friendship which has intimacy and commitment but lacks passion.
Step-by-step explanation:
According to Sternberg's triangular theory of love, the type of love defined by passion and intimacy but no commitment is known as romantic love. This stands in contrast to friendship which is typically characterized by companionate love that includes intimacy and commitment, but lacks the passion normally associated with romantic love. While many relationships will include various levels of intimacy, passion, and commitment at different stages, romantic love is specifically associated with a strong physical attraction combined with emotional closeness, yet without the pledge of long-term commitment.