The spelling of the word "metaplexus" can be explained through its IPA phonetic transcription: /mɛtəplɛksəs/. The first syllable starts with the "m" sound, and is followed by the "eh" sound, represented by the "ɛ" symbol. The second syllable starts with the "t" sound, followed by the "uh" sound represented by the "ə" symbol. The third syllable starts with the "p" sound, followed by the "l" sound, and ends with the "ks" sound. The last syllable starts with the "uh" sound and ends with the "s" sound.
The choroid plexus in the fourth ventricle of the brain.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.