Domain-orientation dependence of levitation force has been determined for single-domainYBa2Cu3Ox.The single-domain material is obtained from a seeded melt growth process. The levitation force has been found to reach a maximum as thecaxis of the domain is parallel to the direction of the force. The levitation force decreases in a cosine law fashion as the angle &thgr; (the angle between the direction of the force and thecaxis) increases from 0° to 60°. A maximum anisotropy of levitation force of 2.29 has been found. A physical model is proposed to explain the observed orientation dependence. ©1997 American Institute of Physics.