[medical] In medicine, guttae, the plural of gutta, is Latin for drops. It is frequently abbreviated as gtts (gtt for singular) and often seen on prescriptions. Other sources abbreviate gt for singular, and gtt for plural. ... Found on http://en.wikipedia.org/wiki/Guttae_(medical)
small projections under the triglyphs in a doric frieze. Said to represent pegs used in the original timber construction. See Classical Architecture. Found on http://www.encyclo.co.uk/local/20935