ˈ ̷ ̷(ˌ) ̷ ̷+ noun
( -s )
Etymology: International Scientific Vocabulary centr- + sphere: originally formed as German zentrosphäre
1.
a. : the differentiated layer of cytoplasm surrounding the centriole within the centrosome
b. : central apparatus
2. : the central part of the earth composed of very dense material and having a radius of about 2200 miles