ladder of abstraction

caterpillar excavating machine DABM dreidl endothall extension arbor for roughing boring tool Fairview Pk. feedsystem little frog in a big pond marmusete metapenaeopsis palmensis method of time measurement periclinal chimaera plextor retinotopy show-goers sleeved rubber spring Software Modeling subcortical intracerebral hemorrhage the cid wiregrass