1.A knoblike enlargement at the end of an axon, where it synapses with other neurons.
突触小结轴突末端的球状神经原增大，在此与其它神经元接触
2.A circular protuberance or knoblike swelling, as on the horns of certain animals.
瘤，节疤凸饰环状突出或节状肿起，如在一些动物角上的突起
3.Having or resembling a knob or knoblike protuberance.
有或象圆形突起或圆形突起状的突出物的
4.small, knoblike pendent object, such as a plumb bob.
小的球状悬挂物，如铅锤
5.Any of various knoblike structures of a plant or animal, especially:
植物或动物的各种球状结构，尤指：