classic

A work of timeless quality and excellence exemplary of a particular style, genre, or era. This is distinct from the concept of a masterpiece {vI'ba'om};…

beryllium

The fourth element of the periodic table. A strong, lightweight metal. Found in gemstones, including emeralds. Used by 21st century humans for aircraft and spacecraft…

gymnastics/acrobatics

A sport or artistic performance consisting of sequences of movements requiring physical strength, flexibility, and kinesthetic awareness.

advantage

Any condition, circumstance, opportunity, or means, particularly favorable to chance or success or to any desired end.

clause

A verb and its modifiers such as subjects, objects, and other arguments; may be independent or dependent on other clauses.

ladder

A vertical or inclined row of rungs for climbing up and down, usually set between two long side pieces. Often portable. Usually distinguished from stairs…

carousel/turntable

A revolving platform usually round or a device incorporating a revolving platform.

chord [music]

A harmonic set of multiple notes that is heard as if sounding simultaneously.

stem cell

A primal undifferentiated cell from which a variety of other cells can be generated through a process of cellular differentiation.

lithium

The third element on the periodic table, a soft reactive metal in its pure form. Used by 21st century humans for rechargeable batteries and psychiatric…