clearing clearing /ˈklɪrɪŋ/

noun

1. () A tract of land with few or no trees in the middle of a wooded area  ( glade , clearing )
   a tract of land with few or no trees in the middle of a wooded area
    They set up their campsite in a clearing surrounded by tall pine trees.
   They set up their campsite in a clearing surrounded by tall pine trees.
   
   
2. The act of removing solid particles from a liquid  ( clarification , clearing )
   the act of removing solid particles from a liquid
   
3. The act of freeing from suspicion  ( clearing )
   the act of freeing from suspicion
   

 ad ad /æd/

noun

1. () [Informal] A public promotion of some product or service  ( advert [British] , advertizement [American, Non-standard] , advertizing [American, Non-standard] , ad [Informal] , advertisement , advertising )
   a public promotion of some product or service
    I saw an advertisement for a new movie during the commercial break
   I saw an advertisement for a new movie during the commercial break
   
   

 AD

adverb

1. In the Christian era; used before dates after the supposed year Christ was born  ( A.D. , AD , anno Domini , year of our Lord )
   in the Christian era; used before dates after the supposed year Christ was born
    In AD 200
   in AD 200
   

 genus Doodia genus Doodia /ˈdʒiːnəs doʊˈdiːə/

noun

1. In some classification systems placed in family Polypodiaceae; small terrestrial colony-forming ferns of Australasia  ( Doodia , genus Doodia )
   in some classification systems placed in family Polypodiaceae; small terrestrial colony-forming ferns of Australasia
   
   

 costal cartilage costal cartilage /ˈkɒstəl ˈkɑːrtlɪdʒ/

noun

1. The cartilages that connect the sternum and the ends of the ribs; its elasticity allows the chest to move in respiration  ( costal cartilage )
   the cartilages that connect the sternum and the ends of the ribs; its elasticity allows the chest to move in respiration
    The costal cartilage provides flexibility to our ribcage, aiding in respiration.
   The costal cartilage provides flexibility to our ribcage, aiding in respiration.