What does "based" mean?

Based: Etym: [See Base, n., 18-21.] Wearing, or protected by, bases. [Obs.] "Based in lawny velvet." E. Hall. BASEDOW'S DISEASE Ba"se*dow's dis*ease". Etym: [Named for Dr. Basedow, a German physician.] (Med.) A disease characterized by enlargement of the thyroid gland, prominence of the eyeballs, and inordinate action of the heart; -- called also exophthalmic goiter. Flint.

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