glabrously

This adverb is strictly confined to technical, botanical, and anatomical registers. It describes a state of smoothness characterized by the total absence of hair, pubescence, or scales, typically used to provide precise morphological descriptions of plant stems, leaves, or animal skin.

Due to its highly specialized nature, using this word in casual conversation would be perceived as overly formal or pedantic. It is almost exclusively found in taxonomic keys, medical reports, or biological research papers to distinguish a smooth surface from one that is pubescent or scabrous.