loon loon /ˈluːn/

noun

1. () Large somewhat primitive fish-eating diving bird of the Northern Hemisphere having webbed feet placed far back; related to the grebes  ( diver , loon )
   large somewhat primitive fish-eating diving bird of the Northern Hemisphere having webbed feet placed far back; related to the grebes
    The haunting call of the loon echoed across the calm lake.
   The haunting call of the loon echoed across the calm lake.
   
   
2. () A worthless lazy fellow  ( loon )
   a worthless lazy fellow
   
3. A person with confused ideas; incapable of serious thought  ( addle-head , addlehead , birdbrain , loon )
   a person with confused ideas; incapable of serious thought
   

 thenar thenar /ˈθiːnɑːr/

adjective

1. Of or relating to the palm of the hand or to the area at the base of the thumb  ( thenal , thenar )
   of or relating to the palm of the hand or to the area at the base of the thumb
   

noun

1. The inner surface of the hand from the wrist to the base of the fingers  ( thenar , palm )
   the inner surface of the hand from the wrist to the base of the fingers
    She placed her palm on the cool surface of the window to ease the headache
   She placed her palm on the cool surface of the window to ease the headache
   
   
2. The fleshy area of the palm at the base of the thumb  ( thenar )
   the fleshy area of the palm at the base of the thumb
    The thenar muscles assist in the movement and strength of the thumb.
   The thenar muscles assist in the movement and strength of the thumb.
   
   

 radiomicrometer radiomicrometer /ˌreɪdioʊmaɪˈkrɪmɪtər/

noun

1. Radiometer that is extremely sensitive  ( radiomicrometer )
   radiometer that is extremely sensitive
    Scientists employed a highly sensitive radiomicrometer to measure minute energy changes.
   Scientists employed a highly sensitive radiomicrometer to measure minute energy changes.
   
   

 besom besom /ˈbiːsəm/

noun

1. A broom made of twigs tied together on a long handle  ( besom )
   a broom made of twigs tied together on a long handle
    The old witch in the fairy tale flew on a besom, cackling into the night.
   The old witch in the fairy tale flew on a besom, cackling into the night.