This type of noise is usually caused by malfunctioning valve lifters or an exhaust manifold leak. If the noise lasts for more than a minute and completely disappears or dimishes after the engine is warm, the most likely cause is an exhaust manifold leak.
Herma [her-ma] as a name for girls has its root in Greek, and the name Herma means messenger. Herma is an alternate form of Hermione (Greek). ASSOCIATED WITH greek, messenger (prophet)
Freebase (0.00 / 0 votes) Rate this definition: Thymoma. Thymoma is a tumor originating from the epithelial cells of the thymus. Thymoma is an uncommon tumor, best known for its association with the neuromuscular disorder myasthenia gravis. Thymoma is found in 15% of patients with myasthenia gravis. Once diagnosed, thymomas may be removed surgically.