a thin, flat piece of material prepared for examination with a microscope, in particular a piece of rock about 0.03 millimeters thick, or, for electron microscopy, a piece of tissue about 30 nanometers thick
be insensitive (or oversensitive) to criticism or insults
be sensitive (or insensitive) to criticism or insults
existing (or not existing) in large numbers or amounts
used to refer to the police, typically in the context of situations of civil unrest
chromatography in which compounds are separated on a thin layer of adsorbent material, typically a coating of silica gel on a glass plate or plastic sheet
be involved in so many different activities or projects that one’s time and energy are not used to good effect
an action or procedure of little importance in itself, but likely to lead to more serious developments