| POSITRON | In physics, an elementary particle also called an antielectron (8) |
| HIGGSBOSON | In physics, an elementary particle with zero spin and mass greater than zero, discovered in 2012 (5,5) |
| NEUTRONS | Postulated by Wolfgang Pauli in 1930, an elementary particle with a very small mass close to zero (8) |
| PLATELET | Minute particle also called a thrombocyte crucial to the clotting of the blood of vertebrates (8) |
| PROTONIC | Pertaining to an elementary particle (8) |
| ELECTRON | CERN to lead 50% to transform an elementary particle (8) |
| NEUTRINO | Sounds like new tree bears no resemblance to an elementary particle (8) |
| HAWAIIAN | Musical instrument also called an acoustic lap steel guitar (8,6) |
| AARDVARK | Nocturnal mammal also called an ant bear (8) |
| LANCELET | Small elongated marine invertebrate also called an amphioxus (8) |
| TUNGSTEN | Two animals unite - here's an elementary alternative |
| BOXELDER | North American tree also called an ash-leaved maple (3,5) |
| EGGPLANT | Purple-skinned vegetable also called an aubergine |
| SPIN | In physics, the intrinsic angular momentum of an elementary particle or nucleus (4) |
| NEUTRON | What is an elementary particle of an atom (7) |
| PROTON | What is an elementary particle present in every atomic nucleus (6) |
| KAON | Particle also called a K meson |
| STRAIN | Breed or stock; a trait; a melody; deformation of a material from stress in physics; an intense effort; or, a sprain incurred as a result of said wrench (6) |
| PERMEAMETER | In physics, an instrument used to measure the magnetic permeability of a substance or object (11) |
| ATOM | An elementary particle so tiny that it was named for the original belief that it was "indivisible" or unsplittable (4) |
