(biochemistry) Any oligosaccharide having five sugar residues

plural of pentasaccharide

(organic chemistry) Any siloxane having five -Si-O- groups

plural of pentasiloxane

(inorganic chemistry) Any of a family of silicate structures composed of regular three-dimensional pentagonal arrangements of atoms

(poetry) A composition consisting of five verses.

plural of pentastich

(botany) Having, or arranged in, five vertical ranks.

(botany) Containing five seeds.

(architecture) A portico with five columns.