What is having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed. Poor, weak, nervous creatures. Cheyne called?

nervous — Having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed. Poor, weak, nervous creatures. Cheyne. (Webster's 1913.)

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