spicule

Spine vs Spicule - What's the difference?

As nouns the difference between spine and spicule

is that spine is the series of bones situated at the back from the head to the pelvis of a person, or from the head to the tail of an animal; backbone, vertebral column while spicule is a sharp, needle-like piece.

Cnidocyte vs Spicule - What's the difference?

cnidocyte | spicule |

In biology terms the difference between cnidocyte and spicule

is that cnidocyte is a capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting while spicule is any of many needle-like crystalline structures that provide skeletal support in marine invertebrates like sponges.

Spicule vs Skeleton - What's the difference?

spicule | skeleton |

As nouns the difference between spicule and skeleton

is that spicule is a sharp, needle-like piece while skeleton is the system that provides support to an organism, internal and made up of bones and cartilage in vertebrates, external in some other animals.

As a verb skeleton is

to reduce to a skeleton; to skin; to skeletonize.

Spicule vs Spongin - What's the difference?

spicule | spongin |

As nouns the difference between spicule and spongin

is that spicule is a sharp, needle-like piece while spongin is a horny, sulfur-containing protein related to keratin that forms the skeletal structure of certain classes of sponges proteinaceous compounds of which the spicules in Demospongiae are composed.