Archencephalon
the primitive forebrain region of the embryo, anterior to the notochord, that gives rise to the midbrain and forebrain.
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- Arch. e.
Architectural Engineer.
- Archenemy
a chief . Satan; the Devil. Contemporary Examples He now reveals that Rich kept Israel alive through boycotts by supplying the country with oil, much of it from its archenemy Iran. Marc Rich Spills His Secrets Allan Dodds Frank November 12, 2009 Historical Examples But he was not prepared for the skilful trap which his […]
- Archenteron
the primitive enteron or digestive cavity of a gastrula. Historical Examples The notochord would almost appear to arise as a third median and dorsal diverticulum of the archenteron (fig. 180 ch). The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour They form the rudiment of the notochord, which, as in Amphioxus, […]
- Archfiend
a chief . . Historical Examples And there came news that the king was in some gambling house with a troupe of that archfiend’s spies. The Weight of the Crown Fred M. White And then the subject became Religion, which was the archfiend’s deadliest weapon. The Jungle Upton Sinclair The archfiend himself is often distinguished […]
- Arch head
a vertical, arc-shaped member fixed to the end of a walking beam, for supporting a chain from which a pump rod or the like is suspended in such a way as to let it rise and fall vertically. Historical Examples A chain from the piston-rod to the arch head, as described in the single-acting engine, […]