A gift given to people who attend a meeting, party, event, etc., especially one which is given on a random basis to one or some of the attendees.

plural of aeroplane

The spatial equivalent of chronology; the science of determining the order in which places or regions occur or are constructed. / (biology) The study of the spatial distribution of organisms.

A hard, dense, black solid made from titanate minerals, used for safely storing radioactive waste.