| MESON | Subatomic particle intermediate in mass between an electron and a proton, typically composed of a quark and an antiquark (5) |
| MESONS | Subatomic particle with a mass between an electron and a proton (6) |
| STABILE | Fixed free-standing abstract art construction typically composed of materials such as wire, sheet metal and wood (7) |
| ATOM | Unit of matter containing one or more electrons and a compact nucleus of protons and neutrons (4) |
| POSITRONS | Elementary particles with the same mass as electrons and a numerically equal but positive charge |
| SEMICOLON | Punctuation mark used to indicate a pause intermediate in length between that of a comma and a full stop (9) |
| FREERADICAL | An atom or group of atoms containing at least one unpaired electron and existing for a brief period of time before reacting to produce a stable molecule |
| BARYON | A subatomic particle with a mass equal to or greater than that of a proton |
| TABLET | Computer that is intermediate in size between a laptop computer and a smartphone. (6) |
| TENOROON | Old woodwind instrument intermediate in pitch between an oboe and bassoon, also known as a fagottino (8) |
| FULLHOUSE | Hand composed of a pair and a three-of-a-kind |
| TWOPLY | Description of yarn composed of a pair of strands or wooden board in layers (3-3) |
| CUSTOMSUNION | A trade bloc of nations, composed of a free trade area with a common external tariff (7,5) |
| UNIVALVE | Of a mollusc, having a shell composed of a single piece (8) |
| BELL | Virginia Woolf's elder sister whose home at Charleston was a retreat for the Bloomsbury set; an artist in the Abstract style whose paintings include Flowers in a Ginger Jar and Cotton, Lavender and Qu |
| OVOLO | In architecture, a moulding with the rounded part composed of a quarter circle (5) |
| OXEYE | What is a common name for any of the plants with flowers composed of a disc with marginal rays, such |
| NEUTRON | An elementary particle with 0 charge and mass about equal to a proton (7) |
| PULLEY | Simple machine composed of a wheel and a rope |
| CHIMERA | Mythological fire-breathing female creature composed of a lion, serpent and goat (7) |
