Key terms & definitions

A payment made by one state or ruler to another as a sign of submission.

Payments made by allied or subject states to Athens, helping finance its military power.

The three-house parliamentary system created by South Africa’s 1983 constitution, with separate representation for whites, Indians and Coloured people but none for Black Africans.

The muscle at the back of the upper arm that straightens the arm at the elbow.

Using a clever scheme to mislead someone or gain an advantage over them.

A Roman dining room.

A group of three parallel words, phrases or clauses used for emphasis or rhetorical effect.

The valve between the right atrium and right ventricle that prevents blood flowing back into the right atrium.

The captain commanding an individual Roman warship.

The liturgy in which a wealthy citizen equipped and maintained a trireme and its crew for a year.

The immediate event that sets off a wider development whose underlying causes have already built up.

A storage lipid formed from one glycerol molecule joined to three fatty acid molecules.

A lipid molecule made from one glycerol molecule chemically joined to three fatty acids.

A type of molecule making up fats and oils. Different triglycerides contain different fatty acids and have different melting temperatures.

An architectural block with three vertical divisions, alternating with metopes in a Doric frieze.

An equation involving a trigonometric function of an unknown angle, such as $\sin x=0.5$.

A function whose output is the sine, cosine or tangent of an angle.

A graph of a trigonometric function, such as $y=\sin x$, $y=\cos x$ or $$, showing how its value changes with the angle .

An equality involving trigonometric expressions that is true for every angle for which both sides are defined.

A relationship between an acute angle and two side lengths in a right-angled triangle, such as sine, cosine or tangent.

The three qualities of material nature: sattva, rajas and tamas.

Cutting away unwanted parts of food, such as excess fat or rind.

The three divine forms associated with creation, preservation and destruction: Brahma, Vishnu and Shiva.

The three Hindu deities Brahma, Vishnu and Shiva, associated with creation, preservation and destruction.

The Christian belief in one God as three persons: Father, Son and Holy Spirit.

A three-night annual absence which interrupted usus and prevented a wife entering her husband's manus by that route.

The secondary education system established following the 1944 Education Act, comprising grammar, secondary technical and secondary modern schools.

Germany, Austria-Hungary and Italy’s defensive alliance, formed in 1882.

A covalent bond formed from three shared pairs of electrons.

A covalent bond containing three shared pairs of electrons.