junk heap junk heap /dʒʌŋk hiːp/

noun

1. An accumulation of refuse and discarded matter  ( garbage heap , junk heap , junk pile , refuse heap , rubbish heap , scrapheap , trash heap , trash pile )
   an accumulation of refuse and discarded matter
   
   

 firstborn firstborn /ˈfɝːstˈbɔrn/

adjective

1. First in order of birth  ( firstborn , eldest )
   first in order of birth
    The firstborn child
   the firstborn child
   

noun

1. The offspring who came first in the order of birth  ( eldest , firstborn )
   the offspring who came first in the order of birth
   
   

 Plotinus Plotinus /pləˈtaɪnəs/

noun

1. Roman philosopher (born in Egypt) who was the leading representative of Neoplatonism (205-270)  ( Plotinus )
   Roman philosopher (born in Egypt) who was the leading representative of Neoplatonism (205-270)
    Plotinus' writings on Neoplatonism have shaped philosophical thought for centuries.
   Plotinus' writings on Neoplatonism have shaped philosophical thought for centuries.
   
   

 Arabidopsis thaliana Arabidopsis thaliana /ˌærəbɪˈdɒpsɪs θəˈlaɪənə/

noun

1. A small invasive self-pollinating weed with small white flowers; much studied by plant geneticists; the first higher plant whose complete genome sequence was described  ( Arabidopsis thaliana , mouse-ear cress )
   a small invasive self-pollinating weed with small white flowers; much studied by plant geneticists; the first higher plant whose complete genome sequence was described