Coniferae : [ From conifer, cone-bearing.] A natural order of gymnospermus exogens, consisting of trees or shrubs, found throughout the world. The wood is composed of a uniform woody fiber marked with circular discs. The plants abound with resinous juice, and they yield turpentine, pitch, tar, etc. The leaves are usually alternate, , needle-shaped, and entire. The naked flowers are monoecious and dioecious, the male flowers being in deciduous catkins, and the female in cones.