appendage vs spicule

Other hyponyms of appendage include horn, horn, crest, pseudopod, pseudopodium, flagellum, hair, cirrus, spine, aculea, style, villus, tail, fetlock, tentacle, arista, acromial process, acromion, ala, alveolar arch, alveolar process, alveolar ridge, gum ridge, acrosome, caruncle, caruncula, condyle, coronoid process, processus coronoideus, epicondyle, fimbria, apophysis, spiculum, osteophyte, papilla, papilla, appendix, cecal appendage, vermiform appendix, vermiform process, mastoid, mastoid bone, mastoid process, mastoidal, styloid process, pterygoid process, eminence, tubercle, tuberosity, zygomatic process, trochanter, transverse process, odontoid process, metaphysis, olecranon, olecranon process, ridge, excrescence, papilla, enation, plant process, spinous process, maxillary palpus, labial palpus.