A person, especially a child, seen as being particularly angelic or innocent.
A winged creature attending God, described by Pseudo-Dionysius the Areopagite (c. 5th–6th century) as the second highest order of angels, ranked above thrones and below seraphim; similar to a lamassu in the pre-exilic texts of the Hebrew Bible, more humanoid in later texts.
An artistic depiction of such a being, typically in the form of a winged child or a child's head with wings but no body.
A mischievous child.
One of a pair in a series of small card cylinders arranged around a carding drum; so called from its fancied resemblance to the hedgehog.
A street urchin, a child who lives, or spends most of their time, in the streets.
A sea urchin.
A neutron-generating device that triggered the nuclear detonation of the earliest plutonium atomic bombs.