Any of the genus Cereus of plants of the cactus family, natives to the Americas, from California to Chile.

A ritual, with religious or cultural significance. / An official gathering to celebrate, commemorate, or otherwise mark some event.

(physiology) The localization of the control of special functions, as of sight or of the various movements of the body, in special regions of the brain.

Someone who acts as a host at a formal event. / Someone who conducts a programme of varied entertainment, for example by introducing performers to the audience. / (rap music) A rapper.

(neuroanatomy) The principal and most anterior part of the brain in vertebrates, which is located in the front area of the skull and divided into two hemispheres, left and right, separated by a fissure. In humans it is the largest part of the brain and is responsible for the integration of complex sensory functions and the initiation and coordination of voluntary activity, and the higher mental functions such as consciousness, thought, reason, emotion, and memory.

Of, relating to, or used in a ceremony. / (archaic) Observant of ceremony, ritual, or social forms.

A ceremony, or series of ceremonies, prescribed by ritual.

(neuroanatomy) The grey, folded, outermost layer of the cerebrum that is responsible for higher brain processes such as sensation, voluntary muscle movement, thought, reasoning, and memory.

(neuroanatomy) Part of the hindbrain in vertebrates. In humans it lies between the brainstem and the back of the cerebrum and is formed of two lateral lobes and a median lobe. It plays an important role in sensory perception, motor output, balance and posture.

plural of ceremony