Thin

gracilis

(having little body fat or flesh; slim; slender; lean; gaunt)

macer

(having little body fat or flesh; slim; slender; lean; gaunt)

subtīlis

(having little thickness or extent from one surface to its opposite)

subtīlis

(very narrow in all diameters; having a cross section that is small in all directions)

tenuis

(having little thickness or extent from one surface to its opposite)

tenuis

(very narrow in all diameters; having a cross section that is small in all directions)

tenuis

(having little body fat or flesh; slim; slender; lean; gaunt)

tenuis

(of low viscosity or low specific gravity — see also watery, liquidy, diluted)

vescus

(having little thickness or extent from one surface to its opposite)