plural of Dyck word

(mathematics, combinatorics) A string consisting of n X's and n Y's such that no initial segment of the string has more Y's than X's.

The construction of words from simpler units.

An international organization designed by its founders to supervise and liberalize international trade.

plural of World Exposition

(uncountable) A particular species of worm, Sabella pavonina. / (countable) A worm of this species.

(UK) A person who works with youngsters, to promote informal education.

plural of dirty word

(archaic, intransitive) To perform miracles or magic. / (idiomatic) (transitive with for or on) To be highly successful as a solution.

(informal, often derogatory) A place resembling the Disney World theme park, often typified by a corporately-designed saccharine cheerfulness.