Search the Dictionary

A low fleshy fern (Botrychium Lunaria) with lunate segments of the leaf or frond.

Any surface of semicircular or segmental form; especially, the piece of wall between the curves of a vault and its springing line.

The anterior segment of the thorax in insects. See Insect.

A handlelike process or part; esp., the anterior segment of the sternum, or presternum, and the handlelike process of the malleus.

The distal segment of the fore limb, including the carpus and fore foot or hand.

lled generation F1). In the formation of the germ cells of these crossbreeds a process of segregation occurs such that germ cells, whether male or female, are produced of two kinds, T and t, in equal numbers. The T cells bear the factor "tallness," the t cells are devoid of it. The offspring, generation F2, which arise…

ondition; as, aliment, that which nourishes, ornament, increment; fragment, piece broken, segment; abridgment, act of abridging, imprisonment, movement, adjournment; amazement, state of being amazed, astonishment.

Dividing into cells or segments; characterized by separation into two or more parts or sections by the formation of internal partitions; as, merismatic growth, where one cell divides into many.

Consisting only in part of germinal matter; characterized by partial segmentation only; as, meroblastic ova, in which a portion of the yolk only undergoes fission; meroblastic segmentation; -- opposed to holoblastic.

The proximal segment of the hind limb; the thigh.

One of the serial segments, or metameres, of which the bodies of vertebrate and articulate animals are composed.

A form of spore, usually elongate or falciform, and somewhat amoboid, produced by segmentation of the schizonts of certain Sporozoa, as the malaria parasite.

The middle segment of the brain; the midbrain. Sometimes abbreviated to mesen. See Brain.

The scutum or dorsal plate of the middle thoracic segment of an insect. See Illust. of Butterfly.

The ventral piece of the middle segment of the thorax in insects.

The middle segment of the thorax in insects. See Illust. of Coleoptera.

parts that follow one another in a vertebrate or articulate animal, as in an earthworm; a segment; a somite. See Illust. of Loeven's larva.

Of or pertaining to a metamere or its formation; as, metameric segmentation.

One of the component segments of the body of an animal.

The ventral plate of the third or last segment of the thorax of insects.