4to 4to /ˈfɔrˌtoʊ/

noun

1. The size of a book whose pages are made by folding a sheet of paper twice to form four leaves  ( 4to , quarto )
   the size of a book whose pages are made by folding a sheet of paper twice to form four leaves
   
   

 Ostwald Ostwald /ˈɑːstwəld/

noun

1. German chemist (1853-1932)  ( Ostwald , Wilhelm Ostwald )
   German chemist (1853-1932)
   
   

 shellac shellac /ˈʃɛˌlæk/

noun

1. A thin varnish made by dissolving lac in ethanol; used to finish wood  ( shellac , shellac varnish )
   a thin varnish made by dissolving lac in ethanol; used to finish wood
   
   
2. Lac purified by heating and filtering; usually in thin orange or yellow flakes but sometimes bleached white  ( shellac )
   lac purified by heating and filtering; usually in thin orange or yellow flakes but sometimes bleached white
    The carpenter finished the wooden table with a coat of shellac to give it a polished, shiny look.
   The carpenter finished the wooden table with a coat of shellac to give it a polished, shiny look.
   
   

verb

1. Cover with shellac  ( shellac , shellack )
   cover with shellac
    She wanted to shellac the desk to protect it from water spots
   She wanted to shellac the desk to protect it from water spots
   

 humous humous /ˈhjuːməs/

noun

1. A thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East  ( hommos , hoummos , hummus , humous , humus )
   a thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East