4. (Bot.) A kind of flower cluster in which sessile flowers are
arranged on an unbranched elongated axis.
Spike grass (Bot.), either of two tall perennial American grasses
(Uniola paniculata, and U. latifolia) having broad leaves and large
flattened spikelets. -- Spike rush. (Bot.) See under Rush. -- Spike
shell (Zoöl.), any pteropod of the genus Styliola having a slender
conical shell. -- Spike team, three horses, or a horse and a yoke of
oxen, harnessed together, a horse leading the oxen or the span. [U.S.]
Spike, v. t. [imp. & p. p. Spiked (?); p. pr. & vb. n. Spiking.] 1. To
fasten with spikes, or long, large nails; as, to spike down planks.