  We report strong unidirectional anisotropy in bulk polycrystalline B20 FeGe
measured by ferromagnetic resonance spectroscopy. Bulk and micron-sized samples
were produced and analytically characterized. FeGe is a B20 compound with
inherent Dzyaloshinskii-Moriya interaction. Lorenz microscopy confirms a
skyrmion lattice at $190 \; \text{K}$ in a magnetic field of 150 mT.
Ferromagnetic resonance was measured at $276 \; \text{K} \pm 1 \; \text{K}$,
near the Curie temperature. Two resonance modes were observed, both exhibit a
unidirectional anisotropy of $K=1153 \; \text{J/m}^3 \pm 10 \; \text{J/m}^3$ in
the primary, and $K=28 \; \text{J/m}^3 \pm 2 \; \text{J/m}^3$ in the secondary
mode, previously unknown in bulk ferromagnets. Additionally, about 25 standing
spin wave modes are observed inside a micron-sized FeGe wedge, measured at room
temperature ($\sim \; 293$ K). These modes also exhibit unidirectional
anisotropy.
