Physical. Salmonella bacteria are rod-shaped gram-negative bacteria. Gram-negative bacteria do not retain the crystal violet dye used in the gram staining method due to the fact that they have cell walls that are thin.
Noun. 1. nightie-lingerie consisting of a loose dress designed to be worn in bed by women. nightdress, nightgown, night-robe, gown. intimate apparel, lingerie-women's underwear and nightclothes.
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