The word "Fissicostate" is quite a mouthful to spell and pronounce correctly. Its IPA transcription is /fɪsɪkəʊsteɪt/, which helps us break it down into manageable parts. The first syllable-like sound "fis" is followed by a short "i" sound, then the "koh" and "steyt" sounds. The second part of the word, "-costate," means "having ribs" and is derived from the Latin "costa," meaning "rib." "Fissicostate" is used in biology to describe creatures that have ribbed skeletons.