praseodymium praseodymium /ˌpreɪziːoʊˈdɪmiəm/

noun

1. A soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process  ( atomic number 59 , Pr , praseodymium )
   a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
   
   

 Athyrium filix-femina Athyrium filix-femina /əˈθɪriəm ˈfɪlɪks fɛˈmiːna/

noun

1. Most widely grown fern of the genus Athyrium for its delicate foliage  ( Athyrium filix-femina , lady fern )
   most widely grown fern of the genus Athyrium for its delicate foliage
   
   

 harness harness /ˈhɑːrnɪs/

noun

1. () A support consisting of an arrangement of straps for holding something to the body (especially one supporting a person suspended from a parachute)  ( harness )
   a support consisting of an arrangement of straps for holding something to the body (especially one supporting a person suspended from a parachute)
    Before jumping out of the plane, he double-checked his parachute's harness.
   Before jumping out of the plane, he double-checked his parachute's harness.
   
   
2. () Stable gear consisting of an arrangement of leather straps fitted to a draft animal so that it can be attached to and pull a cart  ( harness )
   stable gear consisting of an arrangement of leather straps fitted to a draft animal so that it can be attached to and pull a cart
    The farmer put a harness on the ox to plow the field.
   The farmer put a harness on the ox to plow the field.
   
   

verb

1. () (animal husbandry) put a harness  ( tackle , harness )
   (animal husbandry) put a harness
    Harness the horse
   harness the horse
   
2. () Exploit the power of  ( harness )
   exploit the power of
    Harness natural forces and resources
   harness natural forces and resources
   
3. Keep in check  ( harness , rein , rule )
   keep in check
    Rule one's temper
   rule one's temper
   
4. Control and direct with or as if by reins  ( harness , rein in , draw rein , rein )
   control and direct with or as if by reins
    Rein a horse
   rein a horse
   

 hypothalamus hypothalamus /haɪpoʊˈθæləməs/

noun

1. () A basal part of the diencephalon governing autonomic nervous system  ( hypothalamus )
   a basal part of the diencephalon governing autonomic nervous system
     The hypothalamus plays a crucial role in regulating body temperature and controlling hunger and thirst.
   The hypothalamus plays a crucial role in regulating body temperature and controlling hunger and thirst.