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 pet·ro·la·tum /ˌpɛtrəˈletəm, ˈlɑ-/
 凡士林油,礦油

 pet·ro·la·tum /ˌpɛtrəˈletəm, ˈlɑt-/ 名詞

 Pet·ro·la·tum n. Chem. & Pharm. A semisolid unctuous substance, neutral, and without taste or odor, derived from petroleum by distilling off the lighter portions and purifying the residue.  It is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent.  It is used as a bland protective dressing, and as a substitute for fatty materials in ointments.
 Note: ☞ Petrolatum is the official name for the purified product.  Cosmoline and vaseline are commercial names for substances essentially the same, but differing slightly in appearance and consistency or fusibility.
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 petrolatum
      n : a semi-solid mixture of hydrocarbons obtained from
          petroleum; used in medicinal ointments and for
          lubrication [syn: petroleum jelly, mineral jelly]