arboretum arboretum /ˌɑːrbɝˈiːtəm/

noun

1. A facility where trees and shrubs are cultivated for exhibition  ( arboretum , botanical garden , botanic garden )
   a facility where trees and shrubs are cultivated for exhibition
   
   

 grossbeak grossbeak /ˈɡroʊsbiːk/

noun

1. Any of various finches of Europe or America having a massive and powerful bill  ( grosbeak , grossbeak )
   any of various finches of Europe or America having a massive and powerful bill
   
   

 diagonal diagonal /daɪˈægənəl/

adjective

1. () Connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face  ( diagonal )
   connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face
    A diagonal line across the page
   a diagonal line across the page
   
2. Having an oblique or slanted direction  ( aslant , aslope , diagonal , slanted , slanting , sloped , sloping )
   having an oblique or slanted direction
   

noun

1. A punctuation mark (/) used to separate related items of information  ( diagonal , separatrix , slash , solidus [Canadian, British] , stroke , virgule )
   a punctuation mark (/) used to separate related items of information
   
2. (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry  ( diagonal )
   (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry
    The diagonal of the square was measured to be 10cm
   The diagonal of the square was measured to be 10cm
   
   
3. An oblique line of squares of the same color on a checkerboard  ( diagonal )
   an oblique line of squares of the same color on a checkerboard
    The bishop moves on the diagonals
   the bishop moves on the diagonals
   
4. A line or cut across a fabric that is not at right angles to a side of the fabric  ( bias , diagonal )
   a line or cut across a fabric that is not at right angles to a side of the fabric
   
   
5. (geometry) a straight line connecting any two vertices of a polygon that are not adjacent  ( diagonal )
   (geometry) a straight line connecting any two vertices of a polygon that are not adjacent
   

 naval tactical data system naval tactical data system /ˈneɪvəl ˈtæktɪkəl ˈdeɪtə ˈsɪstəm/

noun

1. A shipboard system for collecting and displaying tactical data  ( naval tactical data system )
   a shipboard system for collecting and displaying tactical data
    The naval tactical data system onboard provided real-time data for the crew during missions.
   The naval tactical data system onboard provided real-time data for the crew during missions.