Formulate

To arrange; to put in order from a certain consideration of things.

Focus

The center of a circle.

Foci

One of the points of an ellipse.

Formation

The structure of a machine or of a compound.

Fractured

Broken.

Fundamental

Basis; the first form; the original structure.

Fulcrum

The resting place for a lever.

Fusion

Melting. The change of a metal from a solid to a liquid state by heat.

Fusible

That which is capable of being melted.

Fulminate

A substance that will ignite or explode by heat or friction.

Gamut

The scale of sound or light, or vibrations of any kind.

Gear

A toothed wheel of any kind.

Gelatine

A tasteless transparent substance obtained from animal tissues.

Globular

Having the form of a globe or ball.

Glazed

Having a glossary appearance.

Graphite

A metallic, iron-black variety of carbon.

Graduated

To arrange in steps; a regular order or series.

Grinder

Any mechanism which abrades or wears down a substance.

Gullet

The curved notches or grooves between projecting parts of mechanism.

Harmonizing

To make the various parts act together in unison.

H. P

The symbol for horse power.

Helico

A form resembling that of the threads of a screw.

Hexagon

Six-sided.

Heliograph

The system of signaling by using flashlights.

Horizontal

Things level with the surface of the earth; like the surface of water.

Hydrogen

The lightest of all the elements. A tasteless, colorless substance.

Import

To bear, or convey as a meaning.

Impulse

The application of an impelling force.

Impact

A collision; striking against.

Invariably

Constant; without failing.

Inertia

The quality of all materials to remain at rest, or to continue in motion, unless acted on by some external force.

Intersect

To divide at a certain point. The crossing point of one line over another.

Interval

A space; a distance between.

Intensity

Strained or exerted to a high degree.

Interstices

The spaces between the molecules or atoms in a substance.

Intermediate

Between.

Intermeshing

The locking together of gear wheels.

Internal

That which is within.

Inability

Unable to perform or do.

Initial

The first; at the start.

Increment

One of the parts which go to make up the whole.

Inference

Drawing a conclusion from a certain state of things.

Insoluble

A substance which cannot be liquefied by a liquid.