The rhyming of words (in modern English poetry) or of stressed syllables (in old Germanic poetry) within the same line of a verse.

(uncountable) Banishment to a remote part of one's own country as a punishment or sanction. / (countable) A person thus banished. / (figuratively, uncountable) A sense of alienation and uprootedness.

Former name of International Women's Day.

An association founded in 1924 to study the establishment of an international auxiliary language. In 1951, IALA presented Interlingua to the public by publishing the Interlingua-English Dictionary and Interlingua Grammar. Abbreviated IALA.

September 19, a humorous holiday during which observers are supposed to talk like pirates.

plural of one-day international

plural of internally displaced person

Someone who is forced to flee his or her home but who remains within his or her country's borders. Abbreviated as IDP.

(optics, uncountable) A phenomenon where light, instead of passing into a medium of a lower refractive index and refracting away from the normal, is completely reflected by the boundary between the two media because it approaches at an angle greater than or equal to the critical angle.

(optics) total internal reflection