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
   
   

 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
   

 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
   

 single-valued function single-valued function /ˈsɪŋɡəlˈvæljud ˈfʌŋkʃən/

noun

1. (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)  ( map , mapping , mathematical function , function , single-valued function )
   (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
    In mathematics, the sine function associates every point of a circle's circumference with a height.
   In mathematics, the sine function associates every point of a circle's circumference with a height.