Words similar to spines

Example sentences for: spines

How can you use “spines” in a sentence? Here are some example sentences to help you improve your vocabulary:

According to Bremer and Humphries [ 2 ] , the Artemisia -group is monophyletic and defined by heterogamous-disciform capitula (disk florets usually bisexual and fertile, ray florets pistillate) or homogamous-discoid capitula (disk florets usually bisexual and fertile, ray florets absent), pollen with short or no spines (associated with anemophily), and thick-walled cypselas devoid of ribs (sometimes faint ribs are present in Sphaeromeria and Crossostephium ). All of the Artemisia -group genera contain species that have been variously placed within the taxonomic boundaries of Artemisia s.l.
Books are supposed to have spines.
I then had to read several book spines, using a well-adapted, pseudo-binary-search algorithm I have developed in my brain over the years, looking for the author's name.
The route from Chaves to Bragança is particularly attractive: the road winds over mountain passes, through pine forests, and past the spines of bare, rocky hillsides.
As for the notion that Bulworth the politicized B-Boy could send shivers down the spines of the Murdochs and Perelmans of the world.