A mutant first discovered in the yeast Saccharomyces cerevisiae, forming small colonies when grown in the presence of fermentable carbon sources such as glucose.
adj
Small, little; insignificant; petty.
of small size.
fairly short and of slim build.
teeny weeny
How often have the words petite and teeny weeny occurred in a corpus of books? (source: Google Ngram Viewer )