DICTIONARY neutral (adjective) 'nü-trul not taking any side in an argument While my cousins argued, I stayed neutral. neutron (noun) 'nü-tron a part of an atom with no electric charge A neutron is a tiny particle with no charge in an atom. nocturnal (adjective) nok-'turr-nuhl active at night Animals that are awake at night are nocturnal. nucleus (noun) 'nü-klē-yus the center of an atom Protons and neutrons make up the nucleus of the atom. number line (noun) 'num-burr 'līn a line that shows number values from least to greatest You can use a number line to compare decimals. O object (noun) 'ob-jikt anything that has shape or form The interesting object in the sky was a drone. obtuse angle (noun) ob-'tüs 'an-guhl an angle that measures more than 90° and less than 180° This obtuse angle measures 130°. oil (noun) oil thick liquid from plants, animals, or chemicals Soybean oil is good for cooking and baking. one-tenth (noun) wuhn tenth one part in ten equal parts Each digit to the right is one-tenth the value of the digit to its left. orbit (verb) 'orr-bit the curved path in which a planet moves in a circle Earth completes an orbit around the Sun each year. organic (adjective) orr-'ga-nik produced naturally without chemicals The children pick out organic tomatoes at the market. outer (adjective) 'ow-turr located outside The outer planets are farthest from the Sun. E F G 342 DICTIONARY neutral outer
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