Definition of Mylar in English:

Mylar

Syllabification: My·lar
Pronunciation: /ˈmīˌlär
 
/

noun

trademark
A form of polyester resin used to make heat-resistant plastic films and sheets.
More example sentences
  • If they are sleeved in plastic, be sure it is not PVC plastic (look for Mylar or polypropylene).
  • A balloon constructed of a tough polyester film called Mylar will deliver her to the edge of space.
  • It has an optical quality far better than other materials, such as Mylar or polypropylene, that are typically used in laboratories.

Origin

1950s: an arbitrary formation.

Definition of Mylar in:

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Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope