4. (Science: zoology) The red or cuckoo gurnard (Trigla pini)
5. (Science: zoology) One of the asexual polymorphic forms of white ants, or termites, in which the head and jaws are very large and strong. The soldiers serve to defend the nest. See Termite. Soldier beetle, a large geometrid moth (Euschema militaris), having the wings bright yellow with bluish black lines and spots.
(Science: botany) Soldier orchis, a kind of orchis (Orchis militaris).
Origin: OE. Souldier, soudiour, souder, OF. Soldier, soldoier, soldeier, sodoier, soudoier, soudier, fr. L. Solidus a piece of money (hence applied to the pay of a soldier), fr. Solidus solid. See Solid, and cf. Sold.