ruler ruler /ˈruːlɝ/

noun

1. () A person who rules or commands  ( swayer , ruler )
   a person who rules or commands
    Swayer of the universe
   swayer of the universe
   
2. () Measuring stick consisting of a strip of wood, metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths  ( rule , ruler )
   measuring stick consisting of a strip of wood, metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
    I use a ruler to draw straight lines in my notebooks
   I use a ruler to draw straight lines in my notebooks
   
   

 unconsciousness unconsciousness /ˌənˈkɑːnʃəsnɪs/

noun

1. A state lacking normal awareness of the self or environment  ( unconsciousness )
   a state lacking normal awareness of the self or environment
    After the accident, he slipped into unconsciousness for several hours.
   After the accident, he slipped into unconsciousness for several hours.
   
   

 microwave microwave /ˈmaɪkrəˌweɪv/

noun

1. () A short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data  ( microwave )
   a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data
   
2. Kitchen appliance that cooks food by passing an electromagnetic wave through it; heat results from the absorption of energy by the water molecules in the food  ( microwave , microwave oven )
   kitchen appliance that cooks food by passing an electromagnetic wave through it; heat results from the absorption of energy by the water molecules in the food
    The microwave oven is perfect for heating up leftovers
   The microwave oven is perfect for heating up leftovers
   
   

verb

1. Cook or heat in a microwave oven  ( micro-cook , microwave , nuke [Informal] , zap [Informal] )
   cook or heat in a microwave oven
    You can microwave the leftovers
   You can microwave the leftovers
   

 cross-link cross-link /ˈkrɔːs lɪŋk/

noun

1. A side bond that links two adjacent chains of atoms in a complex molecule  ( cross-link , cross-linkage )
   a side bond that links two adjacent chains of atoms in a complex molecule
   
   

verb

1. Join by creating covalent bonds (of adjacent chains of a polymer or protein)  ( cross-link )
   join by creating covalent bonds (of adjacent chains of a polymer or protein)