seafoam

What it means

1. countableuncountableA foam created by the agitation of seawater.

   Synonyms: spume

2. countableuncountableA light green-blue color.

   The bolts were stacked near a wall in shades of teal, seafoam, turquoise, navy, sapphire, sky blue, cream, gold, crimson, coral.

   2008 May 28, Eric Konigsberg, “A City Tailor Who Revels in the Boldest Sportswear”, in New York Times

3. countableuncountableA type of confectionery made with egg whites, corn syrup, and brown sugar.

   Though it is possible to beat the seafoam by hand, I strongly recommend using an electric beater, as it takes a lot of beating to get seafoam to a smooth and even consistency.

   2001, Laura Dover Doran, Making Great Candy: A Sweet Selection of Fun and Easy Recipes

In a sentence

The bolts were stacked near a wall in shades of teal, seafoam, turquoise, navy, sapphire, sky blue, cream, gold, crimson, coral.

2008 May 28, Eric Konigsberg, “A City Tailor Who Revels in the Boldest Sportswear”, in New York Times

Where it comes from

1. Middle Englishsee fom
2. Englishseafoam

From Middle English see fom, see fome, equivalent to sea + foam.