Some nouns have two different diminutives, each with a different meaning: bloem (flower) → bloempje (lit. "small flower"), but bloemetje (lit. also "small flower", meaning bouquet). A few nouns exist solely in a diminutive form, e.g. zeepaardje (seahorse), while many, e.g. meisje (girl), originally a diminutive of meid (maid), have acquired a meaning independent of their non-diminutive forms. A diminutive can sometimes be added to an uncountable noun to refer to a single portion: ijs (ice, ice cream) → ijsje (ice cream treat, cone of ice cream), bier (beer) → biertje. Some diminutive forms only exist in plural, e.g. kleertjes (clothing).