Feminine form related to metreō (to measure). Pertains to measurement standards and the careful assessment of spiritual realities.
God measures all things by His perfect standard. Human measurements fail, but God's assessment is always accurate. He searches the heart and tests the mind (Jeremiah 17:10). No human standard can judge what only God can measure — the thoughts and intentions of the heart. This is why Paul declared: 'It is the Lord who judges me' (1 Corinthians 4:4).