ऊष्मासह मतलब [वि.] - जिस पदार्थ पर ताप या ऊष्मा का कोई प्रभाव न पड़ता हो; (हीटप्रूफ़)। Also see Ushmasah in English.
Here is meaning of Ushmasah in hindi. Get definition and hindi meaning of Ushmasah. What is Hindi definition and meaning of Ushmasah ? (hindi matlab - arth kya hai?).