attenuated

/əˈtɛnjuˌeɪtɪd/
adjective
  1. Reduced in strength, effect, or intensity; weakened.
    • The attenuated virus in the vaccine is safe for human use.
    • The radio signal was too attenuated to reach the mountain village.
    • After weeks of drought, the river's flow was attenuated.
  2. Made thin or slender; stretched out.
    • Years of illness left him with an attenuated frame.
    • The artist drew attenuated figures with long, elegant limbs.
    • The plant's attenuated stems reached toward the sunlight.
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