LEPTOCARDIA n.
The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colorless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus. [Written also Leptocardii.]…
LIGHT a. 2 definitions
for rapid evolutions. -- Light of foot. (a) Having a light step. (b) Fleet. -- Light of heart, gay, cheerful. -- Light oil (Chem.), the oily product, lighter than water, forming the chief part of the first distillate of coal tar, and consisting largely of benzene and toluene. -- Light sails (Naut.), all the sails a…
LOGWOOD n.
The heartwood of a tree (Hæmatoxylon Campechianum), a native of South America, It is a red, heavy wood, containing a crystalline substance called hæmatoxylin, and is used largely in dyeing. An extract from this wood is used in medicine as an astringent. Also called Campeachy wood, and bloodwood.