Meaning : उन्हाच्या कवडशात दिसणारा अत्यंत सूक्ष्म रजःकण.
Example :
त्रसरेणू हे वजनाचे अत्यल्प व सूक्ष्म परिमाण मानले आहे
Translation in other languages :
Fine powdery material such as dry earth or pollen that can be blown about in the air.
The furniture was covered with dust.