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n. A muscle of the back, more fully called longissimus dorsi, notable in man for its great length, forming with the sacrolumbalis the erector spinæ, the muscle which assists in keeping the back straight or erect. It occurs under divers modifications in mammals, birds, etc.

"In the previous post we looked briefly at phorusrhacid diversity, stopping on the way to look at the discovery and naming of that ‘well known’ species Phorusrhacos longissimus from the Miocene of Argentina."

latissimus    extra-ocular    merchantability    ciliary    dilator