• Webster's Revised Unabridged Dictionary
    • a Subcartilaginous (Anat) Situated under or beneath a cartilage or cartilages.
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Century Dictionary and Cyclopedia
    • subcartilaginous Situated below or beneath cartilage; lying under the costal cartilages; hypochondrial.
    • subcartilaginous Partly or incompletely cartilaginous.
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In literature:

Stem even, fibrous striate, outer bark subcartilaginous, flesh white, stuffed, becoming fistulose.
"The Mushroom, Edible and Otherwise" by M. E. Hard