abstract
art
atom
background
beaker
bio
biology
chemical
chemistry
concept
connection
contour
design
dna
education
element
experiment
flask
glass
glassware
graphic
icon
illustration
isolated
knowledge
laboratory
library
line
linear
lineart
liquid
literature
medical
medicine
model
molecular
molecule
open
outline
research
science
shape
sign
structure
symbol
technology
textbook