shepherd dog shepherd dog /ˈʃɛpərd dɒɡ/

noun

1. Any of various usually long-haired breeds of dog reared to herd and guard sheep  ( sheep dog , sheepdog , shepherd dog )
   any of various usually long-haired breeds of dog reared to herd and guard sheep
   
   

 hundred hundred /ˈhʌndrɪd, ˈhʌnɝd, ˈhʌndɝd/

adjective

1. () Being ten more than ninety  ( c , one hundred , hundred , 100 )
   being ten more than ninety
    There are one hundred cents in a dollar
   There are one hundred cents in a dollar
   
   

noun

1. () Ten 10s  ( C , century , one C , 100 , hundred )
   ten 10s
   

 Nicol prism Nicol prism /ˈnɪkəl prɪzm/

noun

1. Optical device that produces plane-polarized light  ( Nicol prism )
   optical device that produces plane-polarized light
    The physics student demonstrated how the Nicol prism produced plane-polarized light.
   The physics student demonstrated how the Nicol prism produced plane-polarized light.
   
   

 discretion discretion /dɪˈskrɛʃən/

noun

1. () Freedom to act or judge on one's own  ( discretion )
   freedom to act or judge on one's own
     it is up to local authorities to use their discretion in setting the charges
   it is up to local authorities to use their discretion in setting the charges
   
   
2. () Knowing how to avoid embarrassment or distress  ( circumspection , discreetness , prudence , discretion )
   knowing how to avoid embarrassment or distress
    The servants showed great tact and discretion
   the servants showed great tact and discretion
   
3. The trait of judging wisely and objectively  ( discernment , discretion )
   the trait of judging wisely and objectively
    A man of discernment
   a man of discernment
   
4. The power of making free choices unconstrained by external agencies  ( discretion , free will )
   the power of making free choices unconstrained by external agencies
   
   
5. Refined taste; tact  ( delicacy , discretion )
   refined taste; tact