Are glycans, such as glucose, considered alicyclic compounds?
Seems I underestimated this problem.

First passage from Wikipedia is crucial:


  An alicyclic compound is an organic compound that is both aliphatic and cyclic.


And second is wrong:


  They contain one or more all-carbon rings(...)


(Source)

Glucose is carbohydrate, in its circular form which is found in glycans (also glucose isn't a glycan, but glucose residue is found in many of them) it has oxygen atom in the ring - according to second passage from Wikipedia it therefore shouldn't be alicyclic, but one can easily find mention about alicyclic ethers for ex. here, with oxygen in ring. So I'm changing my answer to:

Yes, they are.